Breed isn't destiny, but it is a head start on understanding your dog. A Border Collie's leash reactivity and a Chihuahua's leash reactivity look identical from the outside — one is frustrated working drive, the other is fear in a six-pound body — and the fix is different for each. Each breed profile here rates energy, trainability, and barkiness, then links to guides tuned to that combination.

Mixed breed? Pick the profile that best matches your dog's behavior rather than their looks — the traits are what the training plan actually keys on.