Autumn has had the runs for over a month now. She went to the vet and he diagnosed her with colitis. He gave me metronidazole to give her which cleared up her farting and made her poo not smell terrible anymore, but it made it even more liquid. I've tried all sorts of things, fasting her for a day, rice, pumpkin, pepto. Nothing has worked. I even gave her a knuckle bone to grind down because she usually has rock solid poop after chewing one. The vet thinks its allergies so we're changing her to salmon and potato food. Honestly, he thinks all animals have allergies I swear. She doesn't so much as chew her feet or scratch or anything. I don't know what else I can try. Any tips?