There's always a trade-off. I have a chain link kennel for strength because foxes, bobcats, and coyotes were my main worry but then had to add a layer of lighter wire to stop the parade of feed-gorging opossums that didn't find the rat/mouse prevention feeders a challenge at all. Would you have...
A rat snake would waltz right through (they eat eggs and chicks up to ~8 weeks). Rodents could also get in so if you use any sort of gravity feeder, they'll be into it. If I were doing it over, I'd spend the money and use hardware cloth for the enclosure. Doesn't matter what you bury so much...
Oh! Crap, I already smoothed it back and stomped it down.
The kids found footprints and they're BIG canine. I thought fox by the determination but now I'm on the lookout for starving abandoned dog.
Considering it was built 7 years ago, that might take some digging. But that's also good news because it's all still sound! IDK how long buried chain link takes to rust but now I know it's longer than 7 years!
We had a roll of chain link left behind by the previous homeowners. I cut it in half lengthwise with mini bolt cutters (horribly tedious, BTW) so there's an 18" skirt of chain link. We dug down just enough to be able to cover it over and it's tied to the framing with wire.
In case you're not sure whether it's worth the trouble... I went to the coop this AM and found that something had persistently tried to dig in late last night or early this morning. Literally, a dig attempt every few inches around the perimeter of the run down to the skirting fence. Where the...