I don't know about cats, but my dog Daisy devours bugs. It's so gross... it's the worst in the summer. My computer is next to a window, and during the summer, the window is covered in moths attracted to the light from this room. Well pretty soon I see Daisy leaping up to the window and snapping up the poor bugs. It's awful! She also paws apart june bugs and crunches them up. I think they are the worst, because she is evil and injures them, and then lets them go so che can catch them again! Finally she steps on them and eats them. It's horrifying. But everyone tells me it's just some extra protien. Still... ack!