It depends. While summer is generally not a peak parasite transmission time in many parts of the country, some horses may require a more aggressive schedule that includes deworming during the summer. The key is to work with your veterinarian to conduct fecal tests to determine your horse’s shedding status (how much and of which parasites he is shedding), then customize the deworming protocol. Low egg shedders typically require only two dewormings a year, whereas high shedders may require up to six treatments. General deworming tips to keep in mind: – Most deworming treatments should be administered during periods of parasite transmission and not during cold winters or hot, dry…