Bone chips (developmental) are quite a common finding in fetlock joints. They do not often cause lameness but can be a hinderance when a client wishes to sell an animal. They can have a detrimental effect on the animal’s value and there is always that question of whether the horse will be more prone to arthritis as the horse ages or there is an increase in workload.
The first images is a front fetlock radiograph from a recent case. This Dressage horse had a chip in this front and also one hind fetlock. The V is marking the chip. These were removed arthroscopically. The second image shows the arthroscopic view of the bone fragment and the third its removal with a pair of rongeurs.