My older cat Bubs has had diarrhea for a day now. He eats soft food and we were putting a little apple cider vinegar in his food because I had read it helps with their coats. He has no other symptoms and is the same old cat but I'm worried that it may be something bigger! Any suggestions on what this could be or how stop it? I don't want to switch him to hard food because I know that can screw up their stomachs. Thanks guys!!