So a little back story. Lily has had it before and never an issue. she got it bad early April, took medication, bland diet and 2 wks all good. then she had uti, more antibiotics. all good, now 5 weeks later diarrhea again. back to vet on wednesday for another thorough exam, no fever and stool sample negative. back on centrine tabs for 3 days and metronidazole for 7 days. bland diet again till normal then gradually add her food. no cause. if it persists, then ultrasound and bloodwork to check digest/pancreas. had full bloodwork done in March and good. i changed her food March 1 to Purina Pro Plan sensitive stomach (fish) I had her on blue buffalo grain free 3 yrs chicken, no issues. i switched with the concers the grain free not good, my vet agreed. she was on food a month before first episode and now been okay for 5 weeks on same food. i want to switch back or something similar but vet stessed to wait till this is all clear, maybe a few months. im really at a loss of what it could be. she had no diarrhea for2 days now its back. still have medicine to finish till June 5. im going on vacation in 18 days and hope this is gone, my pet sitter may not want her with this issue, i may have to cancel my vacation.