To get a positive, definitive IBD diagnosis, they have to be scoped. I did not want to go there with Fletcher (even though he was only 2). We had tried everything else "easy", so my vet said, let's treat it as if it were IBD, and see what happens. That worked for me, and really turned him around! He was very skinny, even though he would (and still does) eat just about anything in sight. He was on Flagyl until his poop became stable, and would go back on it when he had a flare up. I am lucky, in that I can manage his condition with diet, and he rarely needs the medicine anymore. He doesn't try and eat cat poop anymore, either! He will occasionally eat his own poop when he is feeling off. One thing that has helped when I see him getting a bit "off" is Manuka honey. I was very skeptical, and it is expensive, but, at least for him, it really does help.