Horse worming is a necessary part of horse care. But blanket worming and interval dosing are contributing to a growing resistance problem. To ensure effective treatment is given only when your horse needs it, faecal egg counts are important. These will identify if there is an existing worm burden to treat. Annual worming for encysted small redworm should still be carried out. For more information on what to worm and when, see our useful Horse Worming Guide below.