Equine sarcoids are the most common skin tumor in horses, causing significant discomfort and requiring careful treatment decisions to balance welfare and efficacy.
Sarcoids in sensitive locations - around eyes, in the girth area, or near the muzzle - cause pain and interfere with normal function or tack fitting. Fibroblastic sarcoids can grow aggressively and become ulcerated, creating open wounds susceptible to fly strike and infection. The psychological stress of repeated treatments, particularly when tumors recur, adds to welfare concerns. Some horses develop multiple sarcoids simultaneously, creating a significant cumulative welfare burden.