Young, fast-growing horses are prone to a condition called osteochondrosis [ah-stee-oh-kahn-DROE-sus] dissecans [DISS-ah-cans], or OCD for short. That’s when rapid growth outmatches the normal progression of bone development. Bone or cartilage fragments may loosen within the joint, causing inflammation and pain.

OCD occurs most often in large breeds, like draft horses, although other breeds may have genetic predispositions. Additional contributing factors include nutrition and physical trauma — like early training that places undue stress on developing joints.

Common signs of OCD include lameness — especially after exercise — as well as joint swelling and decreased performance. Contact your veterinarian if you notice any of these signs or other abnormalities. Without treatment, OCD can result in permanent loss of mobility.