Give you tips on how to keep pasture as clean as possible to reduce the parasite challenge to your horse Advise you on the correct rotation of wormers to reduce the chances of resistant strains of parasite developing. Give you some general rules to help you develop your own worming routine. Tapeworms Anoplocephala species Tapeworms attach at the junction of the small and large intestine. Bots Gasterophilus These are actually flies, not worms, and often give owners cause for concern over the summer.
Keeping Pasture Clean Where there is extensive grazing and limited horse numbers under the control of a single owner, pasture management can be very effective at reducing levels of parasitism.
Try to remove horse droppings from pasture regularly — twice weekly if possible. Divide paddocks into smaller areas to allow rotational grazing and make it easier to pick up droppings. Try not to over-graze paddocks — ideally no more than 1 — 2 horses per acre.
Grazing pasture with sheep or cattle will reduce the level of horse worm larvae. Horses will still be exposed to some cattle or sheep larvae but these are of limited risk to horses and are easily treated. Harrowing to allow droppings to break up and dry out thus killing the larvae is not usually successful in our climate! This alternate dosing every 13 weeks will control encysted small redworms, large redworm, bots and tapeworms.
April — September summer grazing The worming interval depends on the class of the wormer used. We recommend: Strongid-P repeated every weeks or, Panacur repeated every weeks or, Eqvalan or Equimax repeated every weeks. Tapeworms are a cause of serious colic, especially in young horses. November A five day course of Panacur Guard must be given to control encysted small redworms. These larvae are a cause of diarrhoea, colic and weight loss over the winter.
They also contribute to pasture contamination the following spring. Ulceration of the mouth, bit shyness, sensitivity Stomach irritation and ulceration Colic Tears in the skin that can become infected. Ivermectin and moxidectin wormers will protect the horse against bot fly. The dose should be given in winter after the first frost. This is to ensure that all of the adult flies are killed by the frost and cannot lay any more eggs.
If the frost is after December then treatment should be given anyway to prevent the larvae starting to burrow in the mouth. The eggs are visible and easy to remove. Shopping Basket No items in cart. However, they are not effective against tapeworm. Although ivermectin has some action against the hibernating, encysted cyathostomin larvae, they will not kill all of them and moxidectin has been seen to be far more effective.
Moxidectin is the only licensed product for treatment of encysted cyathostomins to which resistance has not developed therefore it should be reserved for this purpose. Ascarid resistance to Ivermectin is widespread in the UK. This wormer is effective against most species of worm.
However, resistance in cyathostomin populations to Fenbendazole is now extremely widespread and therefore should only be used to treat for small strongyles with proven sensitivity. A 5 day course of Fenbendazole is licensed as a treatment for encysted cyathostomins however most UK populations are now resistant to this wormer.
It is reasonably effective against many mature worms. It can also be used as a treatment against tapeworms at double the dose. Some resistance to this wormer has been recognized. Please see table at the end of this article which shows some of the different wormers and their respective actions. The following is only a basic guide. Please contact one of our vets if you require more in depth advice. It is very important that the correct amount of wormer is given to every horse or it may not be effective.
In some situations it can be toxic. To calculate the correct amount of wormer to give, you can weigh your horse using a set of scales there is a set at Chine House Veterinary Hospital or use a weigh tape.
Accounts Phone: Fax: Email: enquiries chinehousevets. Types of worm. Good pasture management: The pasture should not be overcrowded and droppings should be regularly picked up at least twice a week. Regular faecal worm egg counts during the grazing season so that only those individuals with high counts are wormed. This helps to prevent resistance to wormers. To be accurate, a representative sample must be taken i. Samples must be submitted on the same day as collection or else refrigerated overnight.
Delays in analysis can lead to false negatives Resting the pasture can allow time for worm eggs on the pasture to die. To be effective, the pasture should be rested for at least six months. If it is possible, sharing grazing with other species such as sheep or cattle can be helpful.
New horses, with an unknown history, should be wormed on arrival and should be stabled for two days before going onto the pasture to reduce contamination. Please speak to one of our vets about the appropriate wormer to use. Appropriate use of chemical wormers to reduce the number of eggs passed in their droppings.
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