Hello, My golden puppy Luca is a biter too! To maybe make him stop try this: Make a puppy yelp at him like he hurt you- Make a bellowing noise like he really hurt you- If he bites you once then say OUCH really loud in his face if he bites you again say NO BITE him his face sound disguisted then walk out of the room and leave him all alone for up to 5 minutes then go back in and give him a toy! (of course he'll bark and what not but ignore it. and also make sure where you leave him is a puppy safe room.) hope that helps a little. And words of wisdom: "It will Get worse before it gets better" And its true, cuz' the dog will think 'oh there ignoring me so i have to try to get theme to notice me and then the'll say oh what a good dog!' and what not. So DONT give in to there little sad faces, you have to be a little harsh for a well mannered Dog! Have a good day!