Zoey has IBD and has been on Purina EN for almost 2 years. She hasn't had one flare up on it. I feed it to both girls and have no tear staining and they both seem to be doing well on it. The problem I've had is after all this time they are tired of the EN and are not wanting to eat it. I recently did a phone consolation with a nutritionist in California,
http://www.askariel.com/store.asp. She suggest I try Nature's Variety raw freeze dried and canned rabbit. Zoey's a very picky eater so this is still a work in progress. She said she wants me try get them off kibble, she doesn't think kibble is good for them. She also gave me ideas if I want to home cook for her. If you would like to know more about what she told me just PM me and I'll let you know what I'm trying.