while in whiterun today i just helped the little boy who was being bullied by braith and i was looking for him to tell him braith will not bother him again when a guard said to me "is that fur growing out of your ears" how did that guard know my nord was a werewolf??

They don't know you're a Werewolf, but it is rather odd than a person would be growing hair out of their ears.

it was a weird question for a guard to ask though

I would assume so, haha.

There's one where they ask you to keep the dog down in Jorrvaskr.

well in the skyrim vanilla game you can buy a dog at the whiterun stables.