Nonchemical parasite control strategies, fecal egg count monitoring, and controlled quarantine treatments all can delay the development of anthelmintic resistance (AR) in horses.

These were the recommendations made by a group of German researchers from the University of Veterinary Medicine in Bünteweg, Hannover, after investigating parasite control measures on 76 farms. Participating farms all had more than 10 horses each available for fecal sampling and pasturing, and they were willing to withhold deworming for at least eight weeks prior to commencement of the study.

In total, 2,000 foals, yearlings, and mature horses from riding farms, stud farms, and small holdings were investigated