I am a long-time owner/lover of the dachshund. I am also a new breeder and have a question about one of Penny's first puppies. She is a long-coat black and tan with tan under the tail and on her feet. I don't see any tan points on her face at this point. Maybe a hint of color. Could it be possible that the tan points brighten up with time? I can't find any information on this on the internet. Thanks!