Want some more advice????
Reggie had diarrhea for a LONG time. Soooo...we had medicine from the vet's...like you...off the med and the diarrhea returned. I fed him a bland diet of boiled chicken and rice for 3-4 days...then slowly added wellness canned chicken to this...increasing the dog food until there was no "regular" chicken in it...then slowly added Taste of the wild bison/venison formula....proceeding the same way...decreasing the canned to kibble....eventually feeding just kibble
You can also give a tablespoon daily of plain canned pumpkin. Reggie got that also...but a tablespoon of yogurt. The pumpkin reduces the moisture and the yogurt for the good bacteria in his intestinal tract.
We now have good poops. Yay!

LOL