I've had GSDs for 20 years, and been breeding for 11 and today was a first for the term "silver-tips." I mean, I've heard of sables, black sable, red sable, saddle-back, pencil toes, tar-heels, reverse mask, blancket-back, solid color, liver, blue, white, albino, panda, bi-color, black and brown, black and red, black and tan, black and silver, black and cream, long coat, stock coat, plush coat, long coat no undercoat, roach-back, slab-sided, barrel-chested, round eyes, drop ears, and happy tails. Silver-tip is a new one for me.