White hairs on a black kitten

Hi everyone,

I’ve recently adopted a two-and-a-half-month-old kitten. He’s completely black but has some white hairs scattered throughout his coat. At first, he didn’t have any at all, but as the days go by, more and more are appearing. Some little tufts have even popped up inside his ears. I haven’t managed to see a vet yet to ask about it, so I’m posting here. I was wondering if it could be due to a deficiency in his diet, or perhaps some kind of stress... Or is this just normal for black kittens? Will these scattered white hairs keep increasing and eventually form patches?

The hairs are quite hard to spot on camera, but I’ve attached a few photos anyway ^^