german sheperd pups

How can I get my German Shepherd puppy to stop Bitting?
she keeps biting my feet and hands and, well, basically, biting everything. I bit my toe and started bleeding. I need help .. any advice?
I have a German Shepherd mix puppy, has 4 months and during the first months that we constantly bite is in puppy training classes and the instructor told me that something is frozen because they are leaving the teeth, began to bite if I would make some ice cubes to chew and also told me that to destroy an old towel and screw it into a ball and freezes into a container with water and let it go for it when it freezes, to my surprise, it worked brilliantly. one more thing I was trying to get a toy treatment gum dispenser (those sold in pet stores) and fill it with dog biscuits and peanut butter or cream cheese and freeze it. So basically anything frozen or chilled, and should help you and your puppy. good luck.
German Shepherd pups fight over food