Horse Deworming Schedule by Region & Risk

Credit: Equestrianbusiness

Routine eight week rotations felt simple, but they fueled parasite resistance in small strongyles across many barns in the United States. The modern approach is risk based and test driven. We use fecal egg counts to decide if treatment is needed, we choose the narrowest effective class, and we time action windows to season and regional pressure. This guide gives you clear steps plus practical tools so you can build a program that protects your horse and preserves the medicines we all rely on.

Open the Interactive Deworming Planner to match your climate and risk tier, then print a barn calendar and an FEC log for easy follow through. Accurate dosing starts with a true body weight, so use the Horse Weight and Body Condition Calculator and review How Much Does a Horse Weigh.

60-Second Answer Box

A safe, evidence-based horse deworming schedule starts with your horse’s risk level and FECs, not automatic rotations. In most regions, low-risk adult horses do well with 1–2 targeted treatments per year (often spring and late fall/winter) plus tapeworm coverage once yearly where indicated. Foals/yearlings, new arrivals, and high-density herds need age-appropriate drugs and tighter FEC monitoring. Use our Interactive Deworming Planner to set region-specific timing, FEC and post-treatment reminders, and weight-based dosing—then export a printable calendar for the barn. Always follow label directions and partner with your veterinarian to manage resistance and keep your program safe.

Quick jump: Interactive Deworming Planner

1) Why risk-based deworming (not rotation) wins

Parasite resistance 101 (focus on small strongyles)

Small strongyles (cyathostomins) are the main pasture parasites in adult horses. Decades of calendar-style rotation increased drug pressure, and now many farms see reduced efficacy to common horse dewormers. That’s why we shift to targeted treatments driven by

FEC results, horse risk tier, and seasonal windows.

• Macrocyclic lactones (e.g., ivermectin horse products, moxidectin) remain valuable but must be used judiciously.

• Benzimidazoles (e.g., fenbendazole) and tetrahydropyrimidines (e.g., pyrantel) have variable efficacy; avoid “just-because” use.

• Tapeworms (Anoplocephala) need praziquantel (or double-dose pyrantel pamoate) where they’re endemic.

• Bots are seasonal; address after the first hard frost in temperate zones.

  
  

Bottom line: Test, then treat. Save drug classes for when they’re likely to work, and confirm with post-treatment checks.

What “low / moderate / high” risk looks like

Use these practical signals to place each horse or group. Your dewormer for horses choices and FEC cadence flow from this.

Low risk adult well managed

These horses live in dry lots or low stocking density paddocks, and manure is removed on a regular schedule so pastures stay clean. They have a history of low fecal egg counts and few new exposures, so treatment can be minimal and based on test results rather than the calendar.

Moderate risk mixed turnout

Credit: Greystone-usa

These horses share regular pasture access with multiple herd mates, and manure removal is inconsistent across shared spaces. Fecal egg count history is mixed or the group is grazing new areas, so testing should be a bit more frequent and treatments should follow the numbers and the season.

High risk needs a plan with your veterinarian

This tier includes foals and yearlings, new arrivals and rescues, and herds kept at higher density or with limited manure management. Recent illness, weight loss, or a pattern of high fecal egg counts also fits here. These horses benefit from a veterinarian guided plan with closer monitoring and carefully chosen products.

Where FECs fit and how to use them

Fecal egg counts (FECs) tell you if treatment is needed and when to give it, so you avoid using dewormer paste for horses when the numbers are already low.

Test before any treatment in early spring, then repeat in late summer or early fall to compare seasons. After treatment, re test in eight to twelve weeks or on the interval your veterinarian recommends for that product.

Match cadence to climate. Temperate barns usually keep the two window pattern. Humid warm regions may watch more closely. Arid high plains often treat less and test more.

Pro tip: Keep a simple log of each result, product class, lot or expiry, dose, and date.

How to do a horse Faecal Egg Count by Tweedie & Associates

Safety note: dosing by accurate body weight

• Never guess. Use a weight tape or calculator, then round up slightly to ensure a full dose—but never exceed label guidance.

• Minis & foals: Follow age/weight limits on the label; some classes (e.g., moxidectin) require extra caution.

• If a syringe of horse deworming paste has notches, set them to your measured weight.

• Keep records and watch for adverse reactions; monitor recovery metrics like Average Heart Rate for a Horse when you’re unsure how your horse is bouncing back.

2) Interactive Deworming Planner

Use our online planner to turn region and risk into a clear horse deworming schedule for the United States. It guides you from the first fecal egg count to post treatment checks and gives weight based dose tips for common horse dewormers and dewormer paste for horses. When you click Calculate the right panel shows next actions and a year plan that you can print.

What the planner does

• Sets a region profile that matches US climate and bot season

• Adapts the plan to age group and shedding level

• Places fecal egg count windows and post treatment checks at eight to twelve weeks or per product interval

• Suggests drug classes by window such as macrocyclic lactones which include ivermectin horse products and when to add praziquantel for tapeworms where endemic

• Produces a printable calendar and an FEC log sheet for your barn records

Quick start steps

1. Pick Age group

   Adults: use the adult plan. Foals and yearlings: use an age specific plan.

2. Choose Shedding level

   Unknown is fine to start. FEC results will refine this.

3. Enter Last fecal date and Result in eggs per gram if you have them. This sets your next check and helps measure product efficacy.

4. Enter Last deworm date and Last product active if known. This prevents repeating a class too soon.

5. Select Climate and Pasture care.

   Climate adjusts windows. Pasture care reflects stocking density and manure pickup.

6. Enter an accurate body weight. Use our calculator if needed. Learn more about horse weight here.

7. Click Calculate. Review the plan and use Print to make a barn copy.

Planner field guide

Form field	Why it matters	Practical tip
Horse name	Helps you save and print per horse	Use the same spelling every time
Age group	Foals and yearlings need different timing and drug classes	Ask your veterinarian before treating young stock
Birth date for foal plan	Aligns age specific milestones	Month and year are enough if exact day is unknown
Shedding level	Predicts how often to check and how likely treatment is	Start as Unknown then update after your first FEC
Last fecal date and result	Anchors your next check and lets you verify efficacy	Collect fresh manure and label by horse
Last deworm date	Prevents stacking products too close together	Record lot number on your barn log
Last product active	Avoids repeating the same class which can speed resistance	Examples include ivermectin moxidectin fenbendazole pyrantel
Climate	Sets default windows for FEC and treatments	You can change climate later and recalc
Pasture care	Adjusts risk based on stocking and manure pickup	Good manure pickup can cut treatments over time
Body weight	Dose accuracy and safety	Round up slightly to ensure a full label dose but never exceed label

How the results are calculated

• Region profile adds the right seasonal windows for the United Stateshumid and warmtemperate four seasonarid and high plainsmaritime or wet coastal

• Risk tier and shedding level fine tune FEC cadencespring baseline then late summer or early fall for most adults

• Last product and date prevent overuse of any one class

• Weight entry maps to label based doses for horse deworming paste and other formats

• The plan places a post treatment check at eight to twelve weeks or the interval recommended for the product used so you can confirm that the dewormer for horses worked on your farm

3) Pick your region

Your horse deworming schedule should match climate and grazing season length. Use this quick table to choose the closest region type. You can change the climate setting inside the planner at any time and recalc to see timing shifts.

Region chooser and what changes

Region type	Common US examples	Season length and parasite notes	FEC rhythm to start with
Humid and warm	Southeast and Gulf states such as Florida Georgia Alabama Louisiana Mississippi coastal Texas southern Carolinas	Longer transmission with only brief cold periods. Pastures stay moist which supports strongyle survival. Bot pressure is long.	Spring baseline FEC then late summer FEC. Post treatment checks eight to twelve weeks after each treatment.
Temperate four season	Northeast Great Lakes Upper Midwest interior Northwest highlands Rockies foothills	True winter interrupts transmission. Prime treatment windows are spring and late fall. Bot season ends at first hard frost.	Early spring FEC then late summer or early fall FEC. Post treatment checks eight to twelve weeks after any treatment.
Arid and high plains or southwest	Arizona New Mexico Nevada Utah west Texas parts of Colorado and Wyoming eastern Washington and Oregon basins	Low rainfall and intense sun reduce larval survival. Risk is lower but not zero. Watch local tapeworm distribution and bot timing.	Spring FEC then late summer FEC. Post treatment checks per product interval. Skip treatment when FEC is low and horse is low risk.
Maritime or wet coastal	Pacific Northwest coast and coastal New England pockets	Cool wet conditions extend survival on pasture. Pasture hygiene has large impact.	Early spring FEC then late summer or early fall FEC. Consider an optional mid season spot check in crowded barns.

Why this matters

Climate sets how long larvae survive on pasture and how quickly horses are re exposed after treatment. Matching your plan to climate reduces unnecessary treatments and helps slow resistance.

Region deep dive

Humid and warm

Moisture keeps larvae alive, so steady manure removal every week makes a real difference. Many barns choose a late fall or winter macrocyclic lactone treatment to address bots and strongyles, then use a spring fecal egg count to decide if a second treatment is needed. Tapeworms are common in many counties, and the planner will suggest a single annual praziquantel timing where that makes sense.

Temperate four season

A true winter pause lowers pasture survival, which is why spring and late fall anchor most adult programs. Plan an early spring fecal egg count before any treatment so you get a clean baseline for the year. Where tapeworms are present, timing often pairs well with the late fall window for efficient scheduling.

Arid and high plains or southwest

Dry air and strong sun lower pasture burden, which allows more reliance on fecal egg counts and fewer treatments when results stay low. Keep water troughs clean and spread out, and design traffic flow to avoid muddy congregation points. Some valleys use irrigation, and if your pastures are irrigated you should manage timing and hygiene like a temperate program.

Maritime or wet coastal

Long cool wet seasons support parasite survival, so strict manure pickup and thoughtful pasture rotation pay off. Crowded barns may benefit from three fecal egg count checks each year, with spring as the baseline, a midsummer spot check, and a late summer or early fall check to guide fall decisions. Consistent hygiene is the main lever in this region and often reduces the need for extra treatments.

4) Risk tiers and baseline schedules

Risk tier reflects both the horse and the environment. Your tier sets how often to test and how likely treatment will be needed. Use the table first, then read the practical notes for each tier.

FEC categories used in many US programs

These are common cutoffs for adult horses. Your veterinarian may choose different thresholds.

Category	Eggs per gram strongyles	What it usually means
Low shedder	under two hundred	Often no treatment needed outside of seasonal anchor unless region or signs suggest otherwise
Moderate shedder	two hundred to five hundred	Targeted treatment guided by season and the previous drug history
High shedder	over five hundred	Treatment likely required and follow up FEC to confirm efficacy is important

Risk tier table

Risk tier	Typical setting	FEC cadence	Likely treatment pattern when FEC indicates	Tapeworm note	Post treatment check
Low risk adult	Dry lot or low stocking density with frequent manure pickup and a history of low FECs	One to two checks each year. Early spring and late summer or early fall	Often one treatment in late fall or winter. Add a spring treatment only if counts warrant	One praziquantel dose yearly where endemic	Eight to twelve weeks after any treatment or per product interval
Moderate risk adult	Regular pasture turnout with multiple horses or inconsistent manure removal	Two to three checks each year	Treat when counts or season indicate. Choose the narrowest effective class based on farm history	Annual praziquantel where endemic	Eight to twelve weeks after treatment
High risk group	Foals and yearlings. New arrivals. Rescues. High density herds. Horses with chronic weight loss or chronic high FECs	Vet guided. Often more frequent checks	Age appropriate classes only. Avoid off label use in foals. Consider quarantine with FEC before turnout	Follow regional guidance and your veterinarian plan	Vet guided checks to confirm efficacy and screen for resistance

Practical notes by tier

Low risk adult

Keep manure pickup steady and avoid overstocking so fields stay cleaner through the season. Use the planner reminders to schedule a spring fecal egg count followed by a late summer or early fall check, then treat only if the numbers say it is needed. When both checks stay low and the horse is healthy, many barns give a single late fall or winter treatment and add annual tapeworm coverage where it is recommended.

Moderate risk

Make pasture hygiene your first move because it directly lowers exposure for every horse on the property. Expect to treat when counts or season indicate rather than on a fixed rotation, and keep a clear barn log with product class, lot or batch number, dose, and date so you do not repeat a class too often. If you want printable logs and the ability to save plans for more than one horse, consider membership. (coming soon)

High risk

Work with your veterinarian to set fecal egg count timing and drug choices for foals and yearlings since age and weight change quickly. Quarantine new arrivals and collect a fecal sample before turnout so you can treat only when results support it. Recheck more often to confirm that products are working as expected, and watch day to day health metrics such as appetite, manure quality, and heart rate recovery. These guides make checks simple for any owner: vital signs guide and early signs of illness

5) Month by month regional calendars

These calendars give you a barn friendly view of the year. Use them with your own FEC results and your veterinarian plan. The planner produces the same layout and lets you print a regional calendar and an FEC log.

Humid and warm

Month	Action	Why it matters
January	Review response to late fall or winter treatment and body condition	Confirms that the anchor treatment did its job
February	Finalize manure removal plan and check drainage around gates and feeders	Wet areas raise exposure throughout the year
March	Spring FEC window and record weights for dosing	Sets your baseline and ensures correct dose if treatment is needed
April	Treat if FEC indicates and set the eight to twelve week check	Timely follow up helps you catch resistance early
May	Begin bot monitoring and fly control	Reduces bot exposure and overall fly stress
June	Rotate or rest paddocks and clean troughs weekly	Limits larval survival and cross contamination
July	Keep manure pickup strict and review stocking density	Heat and moisture keep transmission going
August	Late summer FEC window	Guides fall decisions for each horse
September	Treat if FEC indicates and schedule post treatment check	Keeps the plan individual rather than blanket
October	Continue bot control and pasture hygiene	Bots remain active until real cold arrives
November	Common late fall window for many barns	Often a macrocyclic lactone choice depending on history
December	Add tapeworm coverage where endemic and archive this year records	A single praziquantel dose is typical where tapeworms are common

Temperate four season

Month	Action	Why it matters
January	Winter limits transmission. Focus on barn hygiene and feed storage	Keep stress and colic risk down during the cold season
February	Plan spring FEC and order kits	Ensures you test before any spring treatment
March	Spring FEC window and weight check for dosing	Clean baseline for each horse
April	Treat if FEC indicates and set the eight to twelve week check	Keeps treatments targeted
May	Turnout ramps up. Remove manure frequently	Spring moisture supports survival on pasture
June	Monitor grazing pressure and rotate fields	Avoid overgrazing which increases exposure
July	Bot season begins in many areas	Plan fly control and monitor bot eggs on legs
August	Late summer or early fall FEC window	Compare to spring and adjust plan
September	Treat if FEC indicates and schedule checks	Target strongyles before cool weather
October	Bot activity continues until first hard frost	Mark the frost date on your calendar
November	Late fall window is common and pairs well with tapeworm where endemic	Efficient timing before winter break
December	Review the year and set next spring reminders	Keeps your barn organized for the new season

Arid and high plains or southwest

Month	Action	Why it matters
January	Review records and confirm pasture plan	Lower rainfall still requires planning
February	Improve water and salt placement to spread horses out	Reduces contamination at single troughs
March	Spring FEC window	Baseline for a drier year
April	Treat if FEC indicates and set the eight to twelve week check	Many horses will not need spring treatment
May	Pasture management and composting of collected manure	Sun and dry air help if manure is removed
June	Start bot watch in warmer valleys	Local extension offices can advise timing
July	Maintain manure removal and check shade areas for buildup	Horses spend time in shade which can concentrate manure
August	Late summer FEC window	Guides fall treatment planning
September	Treat if FEC indicates and schedule follow up	Keeps decisions data driven
October	Bot reminders continue where nights are still warm	Stop after the first real frost if your area gets one
November	Many barns use a late fall window especially in irrigated systems	Pair with tapeworm where endemic
December	Audit the program and update the planner settings	Save next year reminders in the planner

Maritime or wet coastal

Month	Action	Why it matters
January	Cool wet supports survival on pasture. Keep manure removal very consistent	Hygiene is the main lever in this region
February	Plan spring FEC and label sample bags by horse	Avoids mix ups and saves time
March	Spring FEC window before any treatment	Clean starting point for the year
April	Treat if FEC indicates and schedule the eight to twelve week check	Confirms that the product worked
May	Pasture hygiene and do not drag wet fields	Dragging during wet periods spreads larvae
June	Consider a mid season FEC if stocking density is high	Finds rising shedders early
July	Bot season may start later than inland regions	Monitor and record observations
August	Late summer or early fall FEC window	Compare to spring to see the trend
September	Treat if FEC indicates and schedule post treatment check	Keep the plan individualized
October	Bot reminders continue until first hard frost or regional equivalent	Coastal zones may not freeze early
November	Late fall treatment window is common. Pair with tapeworm where endemic	Efficient end of year timing
December	Print next year calendar and share with staff	Keeps everyone on the same page

You can try ou interactive deworwing planner

6) Dosing correctly weight class and safety

Accurate dosing protects your horse and keeps parasite control working on your farm. The safest plan starts with a true body weight, the right drug class for the job, and a simple habit of recording what you used and when.

Get the weight right

Use a scale when available. If not, a weight tape plus our calculator gets you very close. Round up a little to avoid underdosing but never exceed the product label.

Links for quick help:

Horse Weight and Body Condition Calculator

How Much Does a Horse Weigh

Practical tips

• Measure at the same time of day and before feeding when you can

• Record the number you actually set on the paste syringe

• Recheck weight at the start of each season and after layups or diet changes

Drug classes in plain language

You will see these names in the planner and on product labels. Choose the class based on your FEC results, your region, and your veterinarian plan.

• Macrocyclic lactonesIvermectin horse products and moxidectin. Strong activity on many adult strongyles and on bots. Use with care and only when indicated. Moxidectin needs extra caution in small ponies, minis, and young stock.

• BenzimidazolesFenbendazole and oxibendazole. Efficacy varies by region due to resistance. Reserve for cases where it still works on your farm based on FEC and veterinary advice.

• TetrahydropyrimidinesPyrantel pamoate. Often used as a targeted option when FEC shows need and the farm history supports efficacy.

• PraziquantelUsed for tapeworms. In many US regions a single annual dose is enough. Often paired with a late fall window.

Notes owners ask about

• Do not blanket rotate classes

• Treat when the FEC and season indicate

• Keep a barn log with date, product, lot or batch number, and dose

Paste syringes and label details

Most horse dewormers that come as dewormer paste for horses have weight marks on the plunger. Set the collar to the measured weight, wipe the mouth, then deliver the full dose at the back of the tongue. Offer a small treat after to help the horse swallow.

Remember, product labels vary so always check your tube:

• Many ivermectin paste syringes are sized for a single horse up to about twelve hundred fifty pounds and are marked in two hundred fifty pound steps

• Many moxidectin paste syringes are sized up to about fifteen hundred pounds with similar marks

• Combination tubes that include praziquantel may have different totals and marks

If a horse weighs more than a single tube treats, you will need a second tube set to the remainder. Never split a tube between horses unless the label and your veterinarian say it is safe to do so and you can measure accurately.

Power packs and special cases

Credit: RRVP

Fenbendazole power packs aare not a general choice for adult horses because resistance is widespread. Keep them for specific situations directed by your veterinarian, for example when diagnostics and history point to a narrow use case or when another class is not appropriate for that patient.

Horses that are ill, minis, geriatrics, and very young foals need an individualized plan with careful dosing and close follow up. When in doubt, ask your veterinarian to set the class, dose, and timing based on your fecal results and your region.

What to do before you reach for a power pack

1. Confirm a current fecal egg count and discuss results with your veterinarian

2. Review what was used last and how the horse responded

3. Check true body weight so any dose is accurate

4. Plan a post treatment check to confirm the product worked on your farm

Weight to dose quick table

This table is a simple owner friendly reference. Always follow your label. Use your measured weight, then set the syringe to the same number or the next notch up.

Measured weight	Typical ivermectin paste tube setting	Typical moxidectin paste tube setting
750 lb	set to 750	set to 750
1000 lb	set to 1000	set to 1000
1250 lb	full tube for many ivermectin products	set to 1250
1500 lb	full tube plus an extra 250 from a second tube if label supports it	full tube for many moxidectin products

If your tube has different totals or notch sizes, follow the marks on that product. When in doubt call your veterinarian. This is also where the planner helps by tying your recorded weight to label based guidance for the specific class.

7) Pasture and barn management that reduces treatments

Good management lowers exposure, lowers FEC results, and lets you use fewer products over time. It also protects horse dewormers so they keep working for years.

Start with the big wins

• Remove manure from small paddocks two to four times per week

• Avoid overstocking and give fields rest time

• Keep hay off the ground with feeders and move feeders to fresh spots

• Clean water troughs often and spread out water and salt so horses do not crowd a single muddy area

Smart grazing choices

• Rotate pastures by season and by growth stage

• Use a sacrifice area during wet periods to protect main fields

• Cross graze with cattle or sheep where that is realistic for your farm since they do not share the same strongyles

• Do not drag fields during warm wet weather because it spreads larvae. Drag only in dry sunny spells and then rest that pasture

Daily and weekly touches that add up

• Walk fencelines and gates to check for muddy congregation points and add gravel where needed

• Skim bot eggs from legs during the season and use fly control to lower overall pressure

• Keep feed rooms tight and rodent proof since spilled feed attracts flies

• Compost or remove collected manure. A real compost pile that heats reduces parasite survival much better than a cold pile

Small management table for barn doors and tack rooms

Move	Why it helps
Manure removal at least twice each week	Fewer larvae mature on pasture which lowers FECs
Rotate or rest fields	Larvae die off while horses are elsewhere
Spread water and salt stations	Reduces manure concentration in one place
Avoid dragging in warm wet periods	Prevents larvae from being spread across the field
Use sacrifice areas in wet months	Protects the main pasture and lowers exposure
Quarantine new arrivals with an FEC	Keeps high shedders from seeding your fields

Bring new horses in with a plan

Quarantine for a short period, run an FEC, treat if needed based on results and region, then recheck before turnout. The planner has a profile for new arrivals so you can place reminders.

A short word about the long game

When you combine good management with the planner and FECs, you often move horses from moderate to low risk over one or two seasons. That means fewer treatments, lower costs, and less resistance pressure while your horses stay healthy and working.

Conclusion

You have everything you need to run a safe and effective deworming program in the United States. Match your climate, use fecal egg counts to decide if treatment is needed, dose by true body weight, and keep simple barn records. The planner turns this into a one page calendar and an FEC log you can print for the tack room. If you work with a veterinarian and stay consistent with testing, most adult horses will need fewer treatments while staying healthier.

Get started now

• Open the Interactive Deworming Planner and pick your climate and risk tier

• Enter last fecal and last product so the plan avoids repeating a class too soon

• Use the Horse Weight and Body Condition Calculator to set an accurate dose

• Print the calendar and FEC log, then post them in the barn

• Join as a member to save plans for multiple horses and set reminders

• Explore certifications if you want structured learning and a credential

Related reading and tools

• How to Tell if Your Horse Is Sick

• How to Tell if a Horse Is Dehydrated

• Equine Metabolic Syndrome

• Five Way Equine Vaccine

• West Nile Virus in Horses

Tools and references

• Interactive Deworming Planner

• Horse Weight and Body Condition Calculator

• Horse Gestation Calculator

• Horse Coat Color Calculator

• Interactive Horse AnatomyInteractive Horse Skeleton

• Interactive Horse Muscles

Memberships and study

• Memberships give you downloads, reminders, and full access

• Certifications add structured training and exams

• Books and study materials support deeper learning

FAQs

How often should I deworm an adult horse in the United States

Most healthy adult horses need one or two targeted treatments per year guided by fecal egg counts plus a single tapeworm treatment where tapeworms are common. Spring and late fall or early winter are common action windows, but you should let your results and your veterinarian set the final plan.

What does a fecal egg count tell me and what numbers matter

A fecal egg count measures strongyle eggs per gram and shows how much the horse is shedding. Many programs use under two hundred as low, two hundred to five hundred as moderate, and over five hundred as high. Test before any treatment so you have a clean baseline, then use the numbers to decide if treatment is needed.

When should I recheck after deworming

There are two useful checkpoints. First, a reduction test about two weeks after treatment confirms that the product worked on your farm. Second, a routine follow up around eight to twelve weeks or the interval recommended for the product helps you schedule the next decision point. Your veterinarian may adjust timing by climate and product class.

What should I use for tapeworms and when

Praziquantel is the usual choice for tapeworms in horses. In many United States regions one annual dose is enough. Many barns pair this with the late fall or early winter window. Your veterinarian can confirm whether tapeworms are common in your county.

Are ivermectin and moxidectin safe for foals and small ponies

Ivermectin is widely used once foals reach the label age and weight. Moxidectin requires extra caution in young stock and small ponies or minis. Always read the label, never guess the dose, and speak with your veterinarian before treating foals and young horses.

Do fixed rotations of dewormers still make sense

Fixed rotations are no longer recommended because they increase resistance pressure without evidence of benefit. Use fecal egg counts and climate timing to decide when to treat and choose the narrowest effective class that still works on your farm.

What should I do with a new arrival before turnout

Quarantine briefly, collect a fecal egg count, and treat only if results and region indicate. Recheck to confirm efficacy before turnout with the herd. The planner has a new arrival profile to place reminders and print a short checklist for the barn.

My horse still shows eggs after treatment what now

Check the dose against a true body weight, confirm the product and lot number, and make sure the fecal sample was fresh and labeled correctly. Run a reduction test about two weeks after the next treatment and contact your veterinarian. Persistent eggs suggest resistance or a mismatch between product and parasites.

For quick checks after any treatment use these guides: Average heart rate for a horse and

The horse vital signs