Nothing is set in stone about what to use and when with regard to worming your horse. One general principle is to annually rotate the active ingredients in the grazing season this is one of many thoughts on ways to reduce resistance building up. When you do this you must remember that there are many products with different brand names that contain the same active ingredient. There are combination products that are targeting more than one parasite but even those differing brands using the same ingredients still need to be used differently particularly when it come to treating breeding stock and foals. Also remember when treating donkeys for worm burden different issues are involved and only a limited amount of products can be used on donkeys so you need a special approach if treating mixed horse and donkeys.
Certain products are recommended for use at specific times of the year but again this is not a must as what we are trying to disrupt is the life cycle of the worms and our seasonal temperatures and conditions are ever changing in the UK.
Different products have different dosage intervals all of which are marked on the packaging so you will have to take that into account when you are working out your seasonal worming plan. Also during the future there may be other factors involved such as moving paddocks, age, pregnancy and such like all of which will need to be factored in any animal management plan. There are also occasions when worm count can be taken to ascertain parasite levels.
There is a plethora of advice and information out there about what to worm your horse with and when and how often and there is no one definitive answer but here at www.wormers-direct.co.uk we listen, learn and collate all the relevant information and data so we can help you when ever you need it.