Thank you for the reply! Yes his pops out of place a good bit and even when it gets maneuvered back into place it doesn’t last long. One leg is always shorter than the other when he is examined. He is back to seeing the physical therapist which is good and will always have to do those stretches I’d imagine. Hamstring tightness and lack of flexibility is a huge problem and it sounds like that is an SI issue as well. I will let him know that he needs to work hard on getting those muscles stronger so this hopefully stop occurring so often!