Tractor has had bloody diarhhea this weekend. I gave him some pumpkin and it firmed up and got less bloody. Then, this morning, I fed the dogs, went to the gym, came home, and there was a huge puddle of bloody diarhhea on the floor. He's too old for parvo (he's 4) and he's the only dog with this problem. We're going to the vet today, but I'm hoping for some other thoughts on what this could be...