My dog is a mutt with many breeds that we aren't really sure about. She is fascinated with rabbits and points, so I assume she has some hunting instincts.
Relatives of mine have a cat. When we go over there the dog whines and pulls on the leash in a way that's unusual for her. She is very interested in the cat. I fear that she might kill the cat if she gets off the leash there, but two things make me wonder if she just wants to play.
The first thing is, I've pet the cat around her, while holding her leash, and she became more interested in the cat's food than the cat itself. The second thing is, she did get away and get to the cat once (we didn't know the cat was inside). I found the cat growling at the dog, and the dog simply sitting and watching it from a few feet away.
I don't want to take a chance, but I'm also interested in hearing what experts say about the behaviors I've described.