How do you stop a puppy from chewing?

You can't stop (nor should you) a puppy from chewing when they are cutting teeth. Think of it as having very itchy teeth. The only way to stop the itching is to chew. The best way is to make sure he/she has plenty of options for chewing. I use a squirt bottle. If a dog starts to chew on something they aren't supposed to I squirt them and then offer them a rawhide, a frozen rope with chicken broth, a toy etc.