When assessing a swollen limb, feel it and note abnormalities such as heat, lumps, crusts, or signs of pain. | Photo: Kevin Thompson/The Horse

5 reasons for swelling, from benign triggers to causes for major concern

Your horse’s sleek, strong legs have remained taut and unblemished throughout (and sometimes despite) his athletic pursuits. Then one day as you offer him breakfast, you notice he has a “fat” leg. Is it cause for alarm or something simple to deal with? Let’s look at the variety of causes for limb swelling.

Initial Assessment Steps

Before you assume the worst, consider that in many cases prompt recognition and treatment can resolve leg swelling. Jump on the situation and contact your veterinarian immediately rather than trying the wait-and-see approach.

First, you’ll want to gather information to share with your veterinarian before making the call. Rosemary Cuming, BVSc MS, MANZCVS, Dipl. ACVIM, of Scone Equine Hospital, in New South Wales, Australia, advises owners to make notes about the whole horse—not just his limbs.