I've got a big piece of land, it is all fenced with a decently high fencing, but during the times animals dug holes below it, some parts broke, some animals climb it.

Since I'd like to cultivate/hold animals in, what would be the best way to make THIS fence animal proof, without relying on other fencing around animals or my cultivations? Is it even possible/worth it? We have wolves, foxes, boars, etc etc etc..

I was thinking about electric wiring somehow (?), does it make it foolproof? Otherwise what other options may I have?