My three month previous Chihuahua is white with a black place near tail. She also has a black ears, & black & white muzzle. At about two months she began building black places or “freckles” all all over her white and on her white muzzle and belly. Teacup Chihuahua https://cristianjjkih.bloggip.com/30334240/a-secret-weapon-for-yorkie-mixed-chihuahua-puppies