Under human conditon, if i see blood in my stool for many days i would go seek professional help to have it diagnoised n medicated. Your 4 legged kid maybe sick n stressed and may need help from the vet. He cant tell you how much he needs to seek help nor does he knows how to go on his own but from the physical discharge i think its enuf for u to bring him to see the vet. So dun delay any longern bring him to see a vet n the next time available.

Do update us on his condiion yeah... concern...