Some powder and liquid drenches are sufficiently palatable to be accepted when mixed with feed. Liquid drenches are preferably administered into the mouth using a hook, pump or syringe. One problem with oral administration of liquids is that of frequent loss of drench. Granules and pellets Other drenches have been specifically formulated for mixing in the feed and are presented as granules or pellets. Molasses or salt is useful in disguising drench taste.
Tube drenches Stomach tubing is the veterinarian's preferred technique of drench administration.
The drench is delivered directly into the horse's stomach, dosage is accurate and there are no problems with large volumes or unpleasant drench odour or taste. Dosage Correct dosage is essential. If cattle scales are unavailable, consider floating your horse to the local weighbridge. Some species of worms have developed an ability to tolerate or resist the killing effects of some drenches. This is called 'drench resistance'.