Congrats on getting your baby back!
I’ve used electric fencing to keep dogs in–around the top for jumpers, and around the bottom for diggers. I have both right now.
We only turn it on long enough for them to get zapped once or twice, then turn it off. It doesn’t take long for them to learn, doesn’t hurt them, and is pretty inexpensive. (you can grab the wire and feel the pulses increase until you let go–definitely uncomfortable)
I haven’t turned it on in about 16 months…
(You’d have to train them with the kids inside so they wouldn’t get into it)
Good luck! π