did you feed the chicken? If so that one has large bones in it. If he has another bloody stool i would take him in to have fecal done as you may have gotten tainted meat as well which can happen with raw. If your dog is acting fine no lethargy, no vomitting, etc then not HGE as they act very sick with that and that would be my biggest concern as they can get that from ecoli or salmonella
Hemorrhagic Gastroenteritis (HGE)
i am not against raw but some dogs cannot handle it and if you are worried about bones my friend feeds this but she feels out the bones and takes them out