That also looks like what happens with my silver/gold Yorkie. Her silver hair comes in darker at the roots then fades as it ages... also seen similar in the black/gold/tan where the gold/tan comes in almost red then fades.
It can happen too, if there's any kind of injury (by that I mean anything from topical flea tx to actual skin damage) to a specific area, the hair comes in darker but then will fade...
I notice it more in the winter months bc they're not outside as much in the sun, which I believe facilitates the fading process... |