Mine used to scrape the treat off my fingers .. ouch. If he was rough, then the next treat he reached for I made my hand into a fist and didn't let him have it. Normally, they lick around trying to get it and I told him "easy" . Eventually he got it. Also, if he's excited, you can also toss the treat on the ground occasionally until he is a bit calmer. I do both. He's very gentle now but it took a while!
Xan Varik von Fernheim (born 4/3/13)