RE: need baby gates and have cats....
There are no gates out there that are made to let cats through but not babies because they would not meet safety standards.
You need to put a hardware mounted gate at the top of stairs - a pressure mounted gate is not at all safe there because it is too easy to push out of place. You don't have to drill a hole in the railing post, you can attach a piece of wood to it with cable ties and drill the gate into the piece of wood. Go ahead and drill into the drywall - that is very easy to repair.
When we need to give our cat access to a space but not baby, we put the gate a few inches higher off the ground. Or you may have to cut a small hole in the gate. But keep in mind that whatever you do to the gate, you need to be sure that only the cats can get through.
Single mom to
DS ("twice exceptional") - September 2002
DS - February 2006
DD - July 2009
DD - July 2009