LOL!!!!
I have 3 Yorkies. Teek is 9 years old and I had never seen him hump anything. We bring home 2 puppies 6 weeks ago and Teek heads for the back of the couch to avoid them. After a couple weeks the puppies playing looks like fun. Teek starts following them around while they play. A week later he is humping them while they play. He humps their butts, sides, head. LOL
It is showing dominance at this young age for a puppy and I think Teek is trying to just play with them. The puppies hump each other too and sometimes try to hump Teek.
It is part of growing up and learning and also showing who is the dominant dog.
The best way to curb the behavior is distraction. Give them a toy to play with to distract them from the behavior.
Good luck.
__________________  It's raining Yorkies here! LOL Teek  ,Rowan  , Raksha (Grand Puppy)  , Raelyn |