D.W.
You've got some great suggestions. Raising the gate so the cats can go underneath seems a good idea for these independent souls. A couple of additional thoughts...hang a bell (short string so no strangulation risk) and teach the dog to ring it ...dogs love to learn tricks and it will give the dog some feeling of control. Take a team approach (with 2 and 4 legged family members) to making the home a safe environment for all. Also, start teaching the baby (under close supervision) how to crawl up and down stairs (going down backwards)...still use the gate, but being prepared for times when maybe someone forgets to shut the gate. I believe the team approach helps kids and animals learn to be considerate of others needs.
Deb