How awful! And I'm such a worrier - I'd be concerned about someone coming back for my new replacements, too. (Had a friend who had his car battery stolen three times in three days - the thief kept returning for his replacement battery!)
I was home late one Friday when a man kicked in my door (he grabbed my purse and ran). That was three years ago, and to this day, if anyone knocks - justs knocks - on my door, the cat runs into the bedroom. I hope your kitty gets over the shock more quickly than mine...poor baby.