Tubes of paste or gel are very convenient and come pre-measured. It is very easy to use the syringe type applicator to place the medication in your horse's mouth. Powders can be mixed into feeds, although a wary horse may pick around the powder so they don't get the full dose.
Liquids can be put on feeds or administered with a syringe directly into the horse's mouth. All deworming products purchased through feed or tack shops are intended to be ingested through the mouth.
Each time you deworm you should use a different product so that parasites don't become resistant to any one type. If you live in an area with year round pasture, the products you'll need will be different from horse owners whose pastures are beneath the snow for several months of the year. Consult with your veterinarian to find out which products are advised for the area you live in.
