I live on the end of my building and there is a "catwalk" (ironic) that
hides cable and phone lines. They walk across that and make it to the
balcony. I hate to poison them, and animal control won't do anything about
cats usually. As I said, I don't think it should be my responsibility to
train her cats, but if she's not willing to keep them inside. BUT found this
morning that one had actually crapped on the concrete (and the cat must have
been sick... YUK!) that I had to go clean up. I've tried cactus-type of
plants on the ledge to block them, but they've managed to knock them off and
I'm out the cost of the pots and plants.