How can I tell if a Springer Spaniel is purebred?

Check its build: a purebred is well-proportioned, muscular, deep-chested, with a broad head, long square muzzle, oval alert eyes, dropped ears, dense glossy coat in black, brown, or white.

Reputable breeders provide a pedigree certificate with three+ generations of records. Purebreds are usually lively, smart, alert, friendly, and obedient, though individuals vary.