Harley has had all the symptoms of IBD for awhile, and is now on his second type of antibiotics to see if it will help. He was on Albon and probiotics for a week, which didn't help, and is now taking Metronidazole, which also doesn't seem to be helping. We had another cat that had IBD really bad, and nothing helped him, so I'm assuming IBD is an uphill battle, and hard to control. Harley is on Natural Balance Salmon and Pea, grain free food, because our other cat has allergies and that is the only food I could find without chicken, and we just give them both the same thing. My question is, is that an okay food for a cat with constant diarrhea, or is there something better, and more beneficial I could be feeding him. My vet doesn't like grain free food, for dogs or cats, and hasn't recommend