@Markulous yes, I'm aware of the huge change in colour and marking as they grow up, but never thought that the undercoat would change colour so drastically
It just looks super weird if you run your hand through his coat and it black on top and white below!
@Emma I was blonde as a baby and only after 2 my hair got darker and now is black...
Now I'm even more curious about why it changed to white after your whole 'chemical levels' explanation!
Ok so I just Googled and apparently it's common for them to change undercoat colours too at 1yo...
According to what I found he is a typical 'black' Husky now:
Black – The outercoat is made up of individual black hairs, white at the root. There may be solid white hairs mixed in with the black. The tail, ears and hindquarters have yellow and brownish hairs mixed in. The undercoat can be white, beige, charcoal or a mixture of the three.