i have the same problem...i have railing on my balcony and outside my apartment. roman actully fell over the edge one time while i was locking my door. luckily, he had his harness on so i was able to catch him....i dont think i had ever been that scared. the the bad thing is i dont think theres much i can do that would be apartment friendly. hopefully u find something so u dont have a scare like me |