I have a 4yr old horse who is starting to develop some bumps on his fetlocks. He has been in moderate training since he was 2 yrs old. The front fetlocks are worse than the hind. What could cause this? The horse has only shown slight lameness once. However, his RF hoof is beginning to shoe vertical cracks. We did have him in a bar shoe. I had them x-rayed. They showed nothing. One vet said he should grow into them, another vet said he is not ever going to be sound and he will get worse. What are your thoughts. Please PM if you need to. I can send photos by email because I was not sure how to post photos on this web site.