In the veterinary profession, we are starting to see some parasite resistance to the dewormers we have for horses.
Our current recommendation is to perform a fecal examination in the fall or spring to determine if your horse is shedding a high number of parasites and needs to be dewormed. We are finding that many horses are being ‘over-dewormed’ and MOST horses are low shedders and do not need to be dewormed.
If your horse is determined to be shedding a low number of parasites, they do not need to be dewormed. A recheck fecal examination can be performed in the spring/fall to determine then if deworming needs to be done at that time. If your horse is a high shedder of parasites, then they would need to be dewormed.
If you are interested in having a fecal exam performed bring in one fresh fecal ball (within 24hours of collection) per horse stored in a ziploc bag- labelled with the horses name. Store in the refrigerator until it can be brought in to the vet clinic.
The cost of the fecal exam is approximately the same cost as a dewormer.
For those owners that are not interested in the above we recommend a rotating deworming schedule: October – Quest Plus (gets all major parasites including tapeworms); February – Panacur; June – Eqvalan.
Foals: Deworm @ 2mos of age with Panacur, then every 2 months until 1.5 yrs (when natural immunity develops).