[Reyna]

Hi all
We have a 1 1/2 year old yorkie named Reyna and last weekend we just got a 3 month old puppy, Roxy. Both are girls....Reyna has started to hump Roxy!!!! What is this all about? I am confused, worried, and a little weirded out. I'm afraid she'll hurt the puppy. What does this mean?

Thanks for your replies!