I know I'm WAY late to the topic, but my U2 lives to chase cats. Not many things excite her more than playing with cats, any cats.
Most of the cats in my home (between myself and my roommates, there are a few) keep their distance because Missy (my U2) is without a doubt the dominant one. A few do enjoy the interaction with her though.
When I first got Missy, I was extremely cautious about the two interacting, but I don't worry anymore. Missy is always in sight. I really think it depends in the cat(s) and bird(s).
Most of the cats in my home (between myself and my roommates, there are a few) keep their distance because Missy (my U2) is without a doubt the dominant one. A few do enjoy the interaction with her though.
When I first got Missy, I was extremely cautious about the two interacting, but I don't worry anymore. Missy is always in sight. I really think it depends in the cat(s) and bird(s).