Similar to how human hair goes grey or white over time, as dogs age many lose pigment in the fur around their face and up to their temples. This is called “frosting”. You may notice frosting in your dog as young as 3-5. I love it when dogs begin to develop a white face as I think it makes them look distinguished. Look at 13-years young Linda (a former Toronto Humane Society resident) - doesn't she look like a wise sage, looking to dole out wisdom? Photo is low res (thanks to my iPhone).

Other dogs change colour as they age. Some start off almost black and eventually can turn a dark brown. This can occur as late as 5 years. Rory is mostly dark brown/black right now (with brindle paws) and I'm looking forward to seeing how her colour will change over time. I love how dogs' fur changes colour just like human hair!