Buttercup is 1 year and 5 months. She is white with black/blue spots. These last few weeks I notice the black spots had white or gray hair coming out. Now most of her black spots are gray. She has a very healthy diet and has regular visits to the vet. She is great condition, acts like a normal crazy 1 year old dog. Is this normal for her hair to be changing colors? I should mention she is a long haired chi. I'm worried because i had a smooth coat chi that was alll black and didn't show gray hair till she was 8-9 years old. I'm just being a worried momma again!