RECOMMENDED DEWORMING SCHEDULE (revised 2016)
Internal parasites are the most common cause of colic in the horse. Colic is the most common cause of death in horses. No horse is ever completely free from the threat of internal parasites. Our best defense against parasite damage requires the protection of our horses’ environment from contamination with parasite eggs. Frequent pasture pick- up (twice weekly) and pasture dragging during dry weather can be very effective to reduce environmental contamination. Due to increasing problems with resistance to deworming products, fecal examination is required to identify the necessary frequency of deworming and the products that are effective. Fecal exams, counting eggs per gram, are used to determine if your horse is a low or high shedder. The best time to submit a fecal is just before the horses are due to be dewormed. More samples and treatment are needed in the beginning; but, as the situation at each farm becomes clear, both monitoring and treatment can become less frequent. That is the goal. It is imperative to obtain an accurate estimate of your horse’s weight with a tape every time medication is administered.
Foals should also be treated less frequently than in the past. After they reach 12 months of age, they will be dewormed as adults, but should not receive Moxidectin until they are 18 months old. Pregnant mares and miniature horses should not receive Moxidectin. Heavily parasitized horses should be treated with a double dose of Panacur (Fenbendazole) paste for 5 consecutive days.
ADULT LOW SHEDDER (Low Eggs Per Gram)
Submit Fecal Yes No
Deworm With Moxidectin (Quest) Ivermectin/Praziquantel
ADULT HIGH SHEDDER (High Eggs Per Gram)
April July November
Submit Fecal Yes Yes Yes
Deworm With Moxidectin Pyrantel Pamoate(Strongid) Ivermectin/ Praziquantel