Thanks for your replies. I guess in the spontanaity of the moment I did as I do with my other dogs, a no and then a quick taking the thing away since I'm boss and I'm the owner of everything ultimately. I do believe Rowdy was not being the bad growling type bite – he took his front teeth and nipped at my arm, pinching it, but it hurt!
I will try to work on the "leave it" command, since I taught that to my mom's poodle and it worked well. Rowdy is smart and is finally getting some of the house rules down. Though he's sneaky when he isn't resting beside you and you forget to watch him... 🙂