[4zenuff]

I have a female pup that will be 16 weeks tomorrow. She is/was just like your pup, but things are getting a lot better.

I told her NO when she would mouth and would hand her a toy. This worked most of the time. I finally started noticing a change last week. This week I noticed that she becomes mouthy when she needs to play, walk and get rid of energy. So when she becomes mouthy, I first tell her NO and distract her. Then I walk her or let her play outside with my other dog. Usually walking does the trick.

Your pup is still very young and it's going to take time, but it WILL come! My other dog was extremely mouthy. He didn't growl or anything, but it took him months to stop!!!