I have a border collie that has an extremely sensitive stomach. We feed him science diet lamb and rice. I've gone through most of the readily available foods and this one sits best with him. Problem is that he still periodically throws it all up. I haven't tried any of the really high end food, because I can't afford it. The science diet is killing me at $35 for 40 lbs, but I keep buying it because he can't seem to handle anything else. He goes through a bag a month. Anyone have any experience with a dog that has a sensitive stomach? ANy solutions that don't break the bank? Thanks in advance.