When I was in high school a good friend of mine got a baby ferret a the same time he brother got a new kitten, and they grew up together. It was hillarious watching them play. I was under the impression that ferrets would kill cats and small dogs living in the same house with them, however I guess growing up with the kitten as a play buddy helped.
Just looked out the window and Socks is outside sitting totally still, under a tree... just looking strait up. Must be a bird there. She is quite a skilled hunter.