He has been unofficially diagnosed with IBD. Never treated with anything other than fortiflora. Maybe I should start there?
Almost forgot I wanted to respond to your comment above. On the "Where Can I Find?" thread, which we use a lot in the Lantus/Lev ISG to find info, there is a section about digestive issues.
You might want to look at these links from the
Where Can I Find? thread:
Digestive Problems:
Constipation, Maggie11 & Ann; Feline Constipation
Hairballs/Chronic Vomiting
Probiotics in IBD (or other) cats
We've had excellent luck with our 2 cats that tend to be constipated by following the probiotic suggestions on the last link. One of my cats, McGee, is a short haired tuxedo boy who was vomiting daily and severely constipated. I thought he was having hairballs until I read the link about chronic vomiting & hairballs. I realized that I wasn't always even seeing hair in the vomit. Then I read the link on probiotics. I started McGee on a probiotic, working from a small amount up to an entire capsule once a day over the course of a couple of weeks. Then he got 1 entire capsule per day for 2 months. I tapered him down to one capsule every other day. We bought the Renew Ultimate Colon Care 80,000 cfu brand - there are others mentioned on the links above as well.
We also give him one very tiny sprinkle once a day of ground flax seed (Spectrum brand - you want a people quality flax seed). Start small and work up in amount so you're just giving the right amount. Too much will cause diarrhea.
Between those two things his constipation and the vomiting are both gone.
Many people have good success just giving plain canned pumpkin or squash for their cat's constipation. Punkin wouldn't eat it, but many seem to like it.
I don't know if that will help with his IBD, but I thought that link about probiotics in IBD kitties was really helpful. Apparently Fortiflora isn't really considered a probiotic, even though it is labeled as such. There is also a link about Fortiflora that was saved on the Where Can I Find? thread here:
Fortiflora.