I hope DJ is feeling better by now. Did you take him to get checked by your vet? The first time I left Zeus with a pet sitter over night he came home and had the runs with blood. I panicked and took him to my vet and she said it was from nerves. He has a sensitive stomach and now I give him an antacid before leaving him. He has gotten better. I hope this is all it is with DJ. Please keep us posted. Hugs to little DJ.