My 10 month old Olde Engligh Bulldogge has had constant issues with loose stool & diarrhea from the get go. We first had him on TOTW High Prairie and his diarrhea never seemed to go away. We switched him to FROMM lamb and lentil about 2 months ago and it immediately got better, but a couple weeks ago it started to come back. He's also been on a no treat diet because of this for the last 2 months as well. I've been thinking of trying a different 4 star formula but thought I'd ask for advice here first.