Stella has had diarrhea on and off for like a month. This past weekend, I was at my boyfriend's house and she was eating Iams Large breed puppy - basically chicken & corn (garbage, I know), but the diarrhea cleared up after 2 days. To be safe, I took her to the vet yesterday and they ran tests for fecal flotation and Giardia (I thought maybe she picked up a bug at the dog park). Both were negative. $118.00 later I ended up with no answers as to what the culprit was and a medicine for Stella that "might" help - it's called Metronidazole. The vet suggested I feed her some boiled hamburger with brown rice last night b/c it's easy on her stomach. She did NOT digest the rice at all!!! Back to diarrhea. When she pooped, it looked exactly the same coming out as it did going in. About six weeks ago, Stella was eating Wellness Fish & Sweet Potato (no brown rice) and doing fine. Then I switched her to Wellness Simple Solutions - Venison (w/brown rice), for variety of protein, and that's when she got diarrhea. I threw out the rest of that bag and switched to Wellness Lamb & Rice (w/brown rice). She's been eating that for the last two weeks and been having diarrhea on and off. I thought brown rice was supposed to be so digestible...is there a possibility the brown rice is the culprit???