Yesterday afternoon I took the chis out to play in the backyard they were both running around & playing with my basset & they were play fighting like usual. I always feed them there dinner outside while my son is playing (we are outside anywhere from 1- 3 hours every afternoon) that way they can eat & then have time to do there business. Chili ate his dinner & some of my bassets (its the same brand nutro) & then went back to playing. He later went to the back of the yard & came back with some blood on his butt so I grabbed him up to see if one of the other dogs had bit him or scratched him I cleaned him off & didnt see anything so I put him back down to play I then saw that he was going potty & it was kinda runny with a trace of blood in it!! He has never donr this before so I have no idea what could cause it. Does anyone have any ideas? I am in the middle of switching his food from wellness puppy to nutro natural choice adult he was also in his crate for quite a few hours yesterday while I went to town but I dont think that would have anything to do with it he is finally learning not to poop in his crate but I cant imagine that holding it would make him have blood in his stool would it?