Worming & how often??

Theresa_F

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My two are in their own paddock. In summer the field is cleared nearly every day and weekly when in the winter paddock until it gets too wet and muddy.

I worm count in April and if necessary will then worm before they go onto the summer fields.

They are again worm counted end of September and then depending on the results are wormed for just tape, or if eggs found, then a multi wormer in October before going onto the winter fields.

Finally they get Equest for encysted red worm at the end of December.

I therefore rarely use wormers more than twice a year, but I only have my two in the field, poo pick regularly and use worm counts to monitor them.

I would also add that for the first two years of using worm counts, I would do a count in July, but as it was always clear, I now find I can get away with less counts and only two wormers a year to ensure that tape and encysted red are killed off as these do not show up in worm counts.
 

micramadam

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Every 3 months. Field is poo picked every day.
Foal (9 weeks old) was wormed at 8 days, 5 weeks and will be wormed again this week. After this worming he will be wormed again at 15 weeks, 23 weeks and then onto the 3 monthly cycle with the rest of them.
 

CrazyMare

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I use a programme called Intellegent Worming - they send me everything I need from worm counts to wormers.
 

Toby_Zaphod

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Traditional worming strategy

Use one type of wormer for an entire grazing season i.e. 12 months starting in the late autumn.
Worm every six weeks, except with EQUEST (13 week interval).
Change the wormer to an entirely different one every 12 months. A suitable rotation would be, (a) Equest (b) Strongid - P, (c) Eqvalan.
The autumn wormer must be Eqvalan (or Equest) every year to help control Bots.
Check faecal egg counts once every 12 months to ensure that the adult worm population is under control (remember encysted larvae do not produce eggs, and cannot be detected clinically).
An annual worming with a double dose of Strongid - P will protect against tape worms.
Only two wormers can kill hibernating small red worms. Equest and Panacur guard. All worm programmes should include at least one treatment with one of these per year.

A good traditional worming schedule would be :-

July Equest
Oct Double Strongid P (to kill tapeworms).
Mid Nov. Equest (this will also kill bots.)
March Equest
July Equest.

Pasture Management. (Applicable to both worming systems)
Collect droppings from the pasture twice weekly.
Many large studs and stables alternate the grazing of pasture with cattle and sheep.
Do not overstock pasture.
New Liverpool System.

Due to concerns about the development of RESISTANCE by small red worms to some of the wormers currently used, clinicians at Liverpool University have devised a system so that the use of anthelmintics (wormers) can be reduced. They point out that under the traditional system many horses are wormed every six weeks even if they have no worm infection. The Liverpool system relies on regularly monitoring the number of eggs in every horse sharing pasture. Liverpool University has developed the Diagnosteq' service to analyse samples and advise when worming becomes necessary.

Collect faecal sample every six weeks and submit for worm egg count. (Diagnosteq £7.00 + V.A.T.). If samples are negative the testing interval is extended to three months and in some cases to six months.
Do not worm the horses unless 50% of animals have an egg count over 300 eggs/g.
Blood sample once yearly to check for tape worms. (Diagnosteq £15.00 +V.A.T.). Can be arranged with annual vaccination.
Take a faecal egg count from any new horse coming onto the yard and worm accordingly.
Advantages of the system are:-

Fewer wormers are used, this will hopefully delay the development of resistance. This should mean that the existing wormers will be available to treat worm infection.
Although the initial set up costs will be higher than the traditional system, eventually there should be a saving on the purchase of wormers.
It's a 'green' system. Fewer drugs are administered to the horses.
Monitoring of the faecal egg counts gives assurance that the worm control strategy is working.

(Courtesy of Pool House Veterinary Clinic web site.)
 
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