Hey all My 4 months old puppy has diarrhea. It started 2 weeks ago, I took him to the vet, they couldn't find anything wrong in his feces, but he gave some meds anyway... We put him on a lean diet for 2 days (rice/chicken, that he absolutely loved). It worked fine, maybe too fine, because he seemed to be constipated for 2 days (didn't go after eating like he usually does etc). Except that 2 days later, it started again! He is in very good health, very active, drinks and eats fine... I supervize him all the time except at night when he's in his crate, and he doesn't eat anything he shouldn't, except grass outside and leaves (also some leftover cardboard my husband left there that I keep trying to get rid of, but it's like he put some of it all over the yard...)... We feed him nature's choice and various treats when we work with him on training, could it be one of those things that give him diarrhea? We have been switching his food in the last 2 weeks because he's running out of what the breeder gave us, but we've been giving him half of it. It's not that bad that he can't hold, but it's pretty runny (sorry if it's gross). Any advice on how to stop it?