[107barney]

When my dog has had colitis, he is usually given metronidazole for a week. They either do fluids in the hospital or subcutaneous fluids and pepcid or cerenia if needed for nausea.

I have brought on loose stools with carrots. I would probably stick with a very bland diet (chicken and rice) until it clears.

If it persists, I would call the vet and ask if you need a referral for an internal medicine specialist to rule out a number of other things like IBD, Protein losing disease, liver disease, etc etc etc.