Aside from a food intolerence, what could this be? I've had him on lamb/rice, duck/rice, duck/potato, fish/sweet potato, and there's been no change at all in his poops, so I'm starting to doubt an intolerance. Sometimes his poops will have a mucus-like membrane over part of them. I was thinking worms but he's on Sentinel which claims to prevent hookworms, roundworms, and whipworms. I'm at my wits' end!