Hmm... maybe the nostrils would be a little too much, it might take away from the look on his face!
I'll colour him if get a chance too, I think pencil crayons would suit it prfectly...
what colours though?
Either crazy colours like blue and green (I just remembered I've already used blue and green in another pic I made earlier) or normal wolf-ish colours like reddish-browns and such... hmmm..