My JRT bit me.

by Mike

Yesterday my dog grabbed a plastic bag and ran under the table with it. I yelled "No" firmly and when I went to take it from him, he showed his teeth and snapped at me. I put my fist near him so a bite wouldn't hurt so bad and he kept biting my fist aggressively. My first instinct was to pin him on his side and he calmed down immediately. I put him in the crate for the rest of the night.(it was bed time anyway) It was pretty frightening and I teach him the drop it command on a daily basis but when he gets something he can't have he knows it and the training doesn't work. What should I do? I never want him to bite me again.