I have no idea, but Manolo's fur kind of changed colors on me too. And she started growing black hairs around her face and head area, they are really slight though. I was kind of happy about it because I had cut her black hairs on her head trying to make a mohawk when she was a puppy, NOT realizing that their coats change color. Well now that we're in Hawaii, we're in much warmer climate and her light tan color which is like blonde started to get darker, like a deep gold.
Who knows?
lol