Hi, I've been reading over the comments and I'm sorry if this is redundant, but what exactly constitutes a sable? Is it red and white with a mixture of black, but not enough black to be a tri? My Heidi only has black on the end of her muzzle, but she was advertised as sable. Her coat IS lightening in the back (it's not as red as it was when she was younger), but she doesn't have any other black anywhere else.