Internal parasites are silent killers. They can cause extensive internal damage, and you may not even realize your animals are heavily infected. At the very least, parasites can lower resistance, rob the horse of valuable nutrients, and cause gastrointestinal irritation and unthriftiness.

Keeping internal parasites under control is an ongoing part of looking after horses. Several different kinds of worms are commonly found in horses, and unless a horse is on a proper deworming program, they can cause serious internal damage before you realize what is happening to your horse.