My dog’s stool is formed but has red blood-clot-like bits and a bloody smell—what is wrong?

Blood in stool mainly suggests large-intestine bleeding from hemorrhagic enteritis, parasites or gut scratches. Hemorrhagic enteritis from bacteria shows blood on the surface or frank blood. Parasites like coccidia and Giardia cause end-of-stool blood or stubborn diarrhea; gut scratches from sharp objects like bones or metal cause severe bleeding with ulcer or perforation risk.

See a vet promptly.