
Please help me understand what is going on.

I purchased Gizmo when he was 7 months old from a breeder in NY. Now, he is 1 yr and 1 month. We have a stuffed kitty cat plush toy. And Gizmo is humping the animal. I am wondering if this woman has possibly bred him before I purchased him? I know animals are animals but, it is soooo hard to see your baby grow up and do big boy things. Is this something that he could have done before or is it about time for him to be doing this?