Since I never remember the litter names long enough anyway, I call puppies by their color when talking about individuals to Pam, like the Silver Sable girl, or the solid red boy. She really just gives them puppy names so people she's talking to about them can know which one she's talking about. I've been calling these variations of "mink" when I'm talking to Pam about them, like "the solid mink girl". The "light mink boy" (more white parti than the other one), and the "dark mink boy".