So, after four rounds of dewormer, one course of Ponazuril, two rounds of Panacur, a grain-free high-protein diet, every probiotic on the market, a total of nearly 30 days of Metronidazole, four weeks of Tylan (and one more to go), at least five fecal tests and one PCR, at least a gallon of bleach (okay, I’m exaggerating a little bit, maybe), and countless litter pan liners and puppy pads, I still. can’t. figure. out. why. the. Munchkins. still. have. DIARRHEA!! My last hope is that their guts need to re-balance their good bacteria and that loading them with more probiotics once they finish their Tylan *might* help.