I really feel for pups at this age, as they must be in pain/discomfort with sore gums, nyla bones are great, but most biting I found happens when your trying to play with them.... there is loads of teething toys on the market ones you can put in the freezer to help soothe the gums, they do grow out of it when they stop teething, I would go for soothing your pups gums rather than punishment at this age
Amazon.com: Dog Toy Pet Stages Cool Teething...