I will start by saying that Oona (11 weeks) is totally normal in her mouthy behavior, and we are working with her on it and seeing some improvement (with some predictable backsliding). She is worse with me and my kid, I think because my husband's deep "hey!" correction got her attention early on. With me and my daughter, she does not seem overly sensitive and sometimes does not respond at all to our "hey" or "off" when she is really wound up. When a toy is at hand, I can usually distract her with it, but not always, and there are times when we get kind of trapped unable to distract/deter her and with her getting increasingly excited by the game of being "detached" or pushed back and then going in for more biting. I'm usually able to stay very focused and can get out of the situation with it's my clothes or hands, but when she bites my bare or socked feet I have a harder time keeping composure by not dancing around, pushing her off etc, that makes it extra exciting for her. I have tried standing totally still and ignoring her and that works about half of the time (she gets bored), but sometimes it is too painful not to react which can create more fun for her. Slippers are a possibility but the ones my and my kid have are furry and she finds them even more irresistable than bare or socked feet. What are your mental or practical strategies for keeping your head when your puppy is making it very difficult? Maybe we just need tougher, less furry slippers for the time being?