I TOO THINK YOU ARE RIGHT TO BE CONCERNED AND PROBLEM IS THAT ALTHOUGH NOT STAYING KITTENS FOR EVER SOME JUST GROW UP TO BE PLAIN NORTY CATS.......................NOT NAMING ONE HERE LOL.
I ALSO HAVE OPEN GAPS LIKE THAT ON STAIRS AND EVEN WORSE THEY CAN LOOK DOWN FROM RIGHT AT TOP TO SEE THE FLOOR.
I HAVE SOMETHING WHICH IS NOT PRACTICAL ON STAIRS LEANING AGAINST THE SLATS............A LADDER AND BEGIND THAT HAVE GOT HARDBOARD.................DOESNT STOP HIS NIBS LOOKING AND SCARING ME!
COULD YOU TEMPORARILY PUT A HARD BOARD BARRIER UP ON THE STAIRS SIDE UNTIL THEY AE OLDER? OR EVEN FROM TOP TO HALF WAY DOWN.
I WORRY ABOUT SOFT THINGS TO BREAK FALLS COS THEY POSSIBLE WOULD NOT BE ABLE TO LAND PROPERLY ON A SOFT SURFACE.........HAVE TO SAY THERE ARE MULTIPLE DETERENTS IN MY HALL LOL SO THINK NORTY CAT HAS FIGURED OUT THAT JUMPING DOWN WOULD NOT BE A GOOD IDEA
HOWEVER THE ONE THAT REALLY BOTHERS ME IS AT TOP WHERE ON MY STAIRS YOU CAN LOOK DOWN BETWEEN THE STAIRS AND SIDE WALL RIGHT TO FLOOR AND IS A KITTEN SIZE GAP.....I DONT KNOW IF YOU HAVE THAT BUT IF YOU DO SOME TEMPORARY BLOCKAGE MAY BE GOOD...........AND OLD CURTAIN, TOWEL OR SHEET MAYBE, TO STUFF IN TO BLOCK.