Learning how to play gently using their mouth is such an important social skill. George was great with Keegan as a puppy...and it sure has paid off, especially since Keegan is 4 times the size of George! Bottom vid is of Taiki and Keegan...they're a riot.
They learn so much through play. How much pressure from mouth is enough or too much and even how to have a squabble and not leave a mark! All my guys went through puppy class. They met tons of puppies all shapes and sizes and also gentle older dogs (Owner of Dogsmart , Alice Fisher's dog, Quilla and Kiernan, Trainer Rita's dog..both LOVE to work ).
ps...I work on human bite inhibition as well, through games with toys ... I don't use my mouth :P
Kee vs Georgie
Kee vs Taiki
Taiki just LOVEs to zoom under Keegan and has even inadvertently bitten him in the privates :O