Thanks for reminding me why I DON'T want a puppy for a while!!!
As the others said, he is just being a pup. Just be sure to give him fun puppy stuff to do, like chewing on stuffed Kongs or other puppy toys.
Oh, and with a 9 week old pup, walking is great, just keep it short for now, and not to fast. You want to take it easy on his bones as they are still a little soft.
Good luck!!
