They have a coop and run that I lock up at night, so they are safe from raccoon, etc when they're sleeping. I have a mastiff mix who has a fixation on fuzzy things, so if I left him out to "protect" the girls, I may end up with a couple of accidentally maimed bantams. The only thing that is an issue for me right now is this freaking cat who keeps popping over the fence to get my girls. I don't want to keep them confined to the run, but this cat is super crafty and I'm afraid she is going to grab one of my girls before I have a chance to stop her. :-/
I guess I was keying in on the word evening.... The only way to keep a cat out of the yard would be to put hotwire around the top of the fence Or extend the fence with something less than sturdy..... cats wont climb things that they feel wont support them. But its not going to be pretty.
I did some research a while back about building a cat proof fence to keep my cats in the yard.... It would work too for keeping cats out....
Here a link to pictures but it will involve reversing the fence to keep them out.... and your neighbors might not sign up....
Cat Proof fencing
There is another way to do cat exclusion is to put a flat hat on your fence of wire.... over hang a foot or so on both sides. but you can support it from your side.
good luck deb