
27/06/2025
📚 What is OCD? 📚
OCD stands for Osteochondritis Dissecans - a musculoskeletal condition in horses, often diagnosed in young horses, characterised by joint swelling, lameness and compensatory issues.
🔎 What is it?
It is a developmental disorder of the cartilage and bone in a horse’s joints. Horse’s skeletons do not calcify until they are 5/6yo and sometimes even 8/9yo in heavy horses. The torque and strain that the ligament/tendons place on the skeleton around joints can lead to separation of the anchoring points from the underlying bone. This can form loose flaps or fragments of cartilage inside the joint - the joint surface becomes irregular, and the shards continue to calcify, now lodged in the ligament/tendon and become bone chips.
Why does it happen?
🏃♀️ Doing too much too young!! Placing too much strain on the anchoring points before the skeleton calcifies and strengthens.
🍱 Nutrition - feeding too much protein whilst a horse is growing - this leads to rapid skeletal growth, with soft tissue struggling to keep up, slowly peeling away cartilage at their anchoring points.
🌱 Mineral imbalance - for example, feeding bran without supporting with calcium can create a bone leaching effect due to the high phosphorus content.
👶 Genetic - some horses are more predisposed to the condition, particularly prevalent in warmbloods.
🩻 How is it diagnosed?
Usually through CT scans and/or investigative arthroscopy. In the early stages, it will not be clear on X-rays. Often there is some swelling and restriction around the joint. There can be compensatory patterns present, and lameness in more advanced cases.
💉 Can it be treated?
There are surgeries that can be carried out, although the outcome will largely depend on the diagnosis being made early enough and the rehabilitation following any treatment.
Prevention is better than cure!
❌ Stop riding young horses
❌ Stop feeding inappropriate diets
❌ Stop breeding from broken/injured horses just because they have a uterus