Age/whiskers query

Just wondered if there's any consensus about when a bun's fur around its muzzle starts to turn white. Because Pascale was a stray we don't know his exact age. The guestimate we got puts him at two, but I noticed he now has white fur coming through around his whiskers, so wonder if he's actually older. :? Any thoughts? :wave:

I used to think that until Onslow started getting them when he was about 3 years old! I tell him it just makes him more distinguished and appealing to the ladies, not that he is turning grey before his time :lol: