Hi. I have a 17 week old female. She has learned not to jump on everyone in the family but my youngest 4 year old son. It's hard for him to physically get her off of him and he just turns away and says no but it does nothing to get her to stop. She's somewhat responsive to me but not always until I put myself in between the two. I've tried using the lease but once she is off and excited all bets are off and she's jumping again .