 Take dog to the vet
My dog King had the same issue when we first bought him so we took him to the vet and she said that he had an upset stomach and gave us some pills and drops to give to him and she told us not to feed him for 24 hours just give him plenty of water and she also gave us a dietary dog food supper for him to start the next day and he has been doing good I haven't seen anymore blood in his bikes |