I have a question. My pup is a blue and tan, but I have read here that people prefer that color, but I have also read the blue coats are genetically not great and all their fur falls out, doesn't grow, or breaks off. Is my pup going to lose all her fur? She is 4 months old and very fluffy. Also doesn't blue mean silver? she has alot of silver coming in and she has a blond, caramel colored tan. Very confused.