When I gelded my Draft/TB he hemoraged after the surgery and the vet had to do a second procedure and give him some internal stitches. About 2 days after the surgery he started coming lame in what appeared to be his back stifle. It was worse when he had been confined to his pen then after a few minutes of work. His symptoms presented themselves as dragging of the leg at the trot or picking the leg up to his stomach while trotting/cantering. It got worse and worse over the next couple of days to the point it was distressing to watch him move around. The vet thought it was stringhalt, EPSM or OCD. We ran a series of tests and did x-rays and they came back showing no orthopedic reason for his lameness. We thought it must be neurological. I was considering putting him down until someone offered me the use of their pasture for the summer. We turned the colt out and within 30 days he was moving fine. The final diagnosis... His stitches were pulled too tight. I just wanted to post this, I know that when I was on the internet looking for a reason he may be lame I found no stories of peoples experience. I thought this might help someone in the future who has a similar situation and is thinking of selling their colt or worse.