Oh don't worry, it's nothing sexual at all. Your pup is only trying to show dominance over your older pooch. All dogs go through this, it's ok.
One morning getting ready, I looked over at Schatzie who was only 7 months at the time and she was humping Annabelle my 4 year old Schnauzer. Poor Annabelle just sat there and took the abuse, LOL. Annabelle is very very submissive and she just gave into Schatzie's actions.
Schatzie was defiantley feeling like the "alpha" dog that morning...
