My little girl is named Sophie, too.

She will be nine months old on September 7th. Sophie was almost all black with just a little tan on her muzzle, toe tips and forehead until she was about four or five months old and then her color started to change with much more added tan on her legs, face, ears and a little silver on her forehead. Sophie's color changes very gradually with increasing tan on all her legs now and her face and ears. Her saddle and tail is a blue/black now. Her coat was cottony but now has more of a modified feel. I am told they can change gradually until they are about two or three years old. There is a sticky at the top of the forum with more information on growth, coats and coloring.

Oh, and she was about 2 lbs at four months and now is 4 lbs.
Jackie & Sophie