A raccoon will, but that’s an easy fix with putting hardware cloth below the grade, around the perimeter. I think you’re on the right track, but check out Bird spikes like the on below.I have never had any animal try to dig under the fence. Possums or coons show up at night looking for an easy meal. I have two large Cane Corsos so I've never had fox or yotes try to get them. Mostly possums and an occasional coon.