I have been pouring over the pictures and such. Knowing my brother just got a Golden- I was wondering when does a Golden " grey" on the muzzle and eyebrows. Or is it related to the coloring? ( ie do reds grey faster or blondes etc). In other words about what age ? I have seen some 8 or 9 year olds here not a hint of grey- while others younger- so - just a question ...