If your pup bites/mouths/puts teeth on skin, tand up and move away, ending the game. Come back to the game with a toy for them to chomp on instead. If they still nip your hand rather than the toy, stand up and move away. Repeat until they get the idea that nipping means end of game and withdrawal of attention. DO NOT make loud noises, shake your hand, tap them on the nose – this will encourage them as they’ll think it is part of the game. If your pup is turning into a little land shark, they probably need a nap. Pop them into their crate/bed with a treat or let them have a cuddle for a sleep.