His name is Tank, he likes to eat and have a long neck, usually he comes in my room, sits, wags tail and wait that I throw a snack

Yep he comes in my room for some snacks

Once he bited me but after 3 hour the bite marks is gone

(If your asking if the bite hurted, yep it hurted for 5 mins and the only way for him to let you go is just throw a snack, he's a spoiled dog T^T)