I'm so sorry to hear about your baby Coby..if Coby were my doggie I'd have him at the vets ASAP. It is not normal to have bloody stool and to vomit yellow bile is not a good sign either.
My Izzy has pancreatitis, SIBO and IBD and she showed all those signs and I did not hesitate to take her to our vet.
Good luck and keep us posted.