Thanks Cody, I think we might try this, and tie it into when he has to be snipped next week seeing as he can't have food from the night before anyway. That might just be long enough to clear his system out. He has a particularly bad poop night last night where he missed the tray and it went over the carpet. Was like thick chocolate sauce!

Have you any idea where I can get a box of the RC sensitive food online? Most the places I've seen are for orders of about 48 pouches. Not ideal as I just want to try him on it. I've ordered some other food to try but I'm going to mix any new stuff in with the Hills pouches as he has been ok on these in the past.