I firmly believe there is something more going on here that needs the help of a specialist. I don’t think constantly changing his food when he’s having this much GI upset is going to do anything but hurt at this point. I understand that you are bothered by the ingredients in Science Diet, I would be too, but until you are able to speak to someone who can actually diagnose the problem and then explain what kind of levels of protein, fat, fiber etc need to be in the food you feed, you probably need to stick to whatever is working the best and stay with that. Feeding those ingredients short term to minimize GI upset is really the best thing and I wouldn’t beat yourself up about it if it is making a difference.
