I bought this awesome steer for my county fair and he had no structure problems but recently i noticed that when i walk him he isn't covering his tracks. I thought maybe it was his hooves since it looked like his toes were longer on one side than the other and they might need to be trimmed. But then i noticed that he is getting kind of stiff in his hocks so i felt the inside of his legs and one leg is swollen on the inside of his hock and the other side is not as bad.. WHAT IS THIS AND HOW CAN I FIX IT???