angry mini toy terrier dog sits in a dog bed, shows aggression towards a cavalier king charles spaniel puppy, growls

dog pet angry aggressive attack teeth bite fang rapid charles spaniel aggression anger danger mammal mini toy terrier fight furious purebred snarling fear puppy rabies canine growling domestic confrontation conflict pedigree rage scary security breed warning mouth cute action cruel evil adorable behaviour defense threat active jumping running two beast arguing escape comfortable