How can I cat-proof my stair banister to ensure the safety of my feline friend?

To cat-proof your stair banister, you can install a barrier such as a mesh or plexiglass panel to prevent your feline friend from climbing or slipping through. Additionally, you can use deterrents like double-sided tape or citrus scents to discourage your cat from attempting to climb the banister. Regularly inspect and secure any loose or weak areas to ensure your cat's safety.