Comment by mcswell

I wasn't arguing for whether cats have consciousness, and I agree that they do, to some extent. (We just lost a 23 1/2 year old cat who had lots of personality.) But killing birds or mice is one of their instincts. One of the triggers is nearness. Young cats will watch a bird through the window with their tail twitching, and the closer the bird is the more excited the cat gets. If they could get through the glass I'm pretty sure they'd go after it. Older cats (my old cat in particular) watched, but either they understand what glass is, or they're too tired to do much about it.