Help. A couple days ago my 15 month old male Yorkie, Riley, started bothering my 11 year old male Yorkie, Henlee. Henlee is neutered and Riley is not. Riley whines all of the time and rubs up against him, he even will try to hump him, he will not leave him alone for one minute. It is driving us all crazy.
When we first got Riley, he was aggressive and tried to hump him all of the time. As he got older he seemed to calm down and it all but stopped. That is why we don't know what is going on.