At Classic Equine, we recommend all horses should have at least once fecal exam done annually. This will ultimately indicate how stringent and what type of protocol should be followed for your horse. Not all horses (even if they are housed together) will be infected by the same parasites and severity of such. In Michigan, the most commonly seen parasites on fecal exams are strongyles (large and small), roundworms, and pinworms. Many other parasites are very prevalent in Michigan horses but are poorly revealed by routine fecal exam. Such parasites include tapeworms, bots, stomach worms, lungworms, and the encysted form of the small strongyle. Because of this, limited anthelminthic protocols should be employed despite mild or negative results on a fecal evaluation.
If your horse has none to mild infestation of parasites, the following schedule should be considered:
- Spring (April or May): Equimax or Zimecterin Gold or Quest Plus
- Fall (After the first hard frost): Equimax or Zimecterin Gold or Quest Plus
- *Quest Plus should be used at least once per year
If no fecal exam is done, or if your horse has more than a mild infestation of parasites, the following schedule should be used until the next fecal exam is performed. Horses in this category should have an additional fecal done 2 weeks after deworming to ensure effectiveness of the dewormer, and then they can follow the above protocol.
- January: Quest (Moxidectin)
- March: Panacur or Safeguard
- May: Equimax or Zimecterin Gold
- July: Strongid or Exodus
- September: Panacur or Safeguard
- November: Equimax or Zimecterin Gold
Notes: Do not use Quest or Quest Plus in horses under 1 year of age or in miniature horses or donkeys.