Hello Im confused on what's going on in her belly. I've taken her to the vet stool sample is negative for worms, parvo and distemper. She came on adult iams from breader. I tried propac puppy food and it got bad fast. So I did chicken and rice got solid started to add a little whole earth farms beef and lamb (all life stages). Changed to dark brown and she gets diarrhea every other day. Vet tried deworming antibiotics and now she's on tylan powder. Seems the vet is geussing I asked about pulling blood and said it's not necessary. Any advice is much appreciated I feel bad for this pup. She well hydrated of course.