If there is one universal truth in the chicken-keeping world, it is this: you can build the most fortress-like coop on the planet, and somehow, some way, a squirrel will find a way to undermine your entire operation. We feel for u/Even-Instance3997, who sounds like they have tried just about everything short of negotiating a truce with their local squirrel mafia. If you have been in a similar rodent standoff, you are definitely not alone, and we recommend checking out Losing my war with the rodents and Chicken fencing help for some fellow-feeling and hard-won tips from keepers who have been right there in the trenches, or rather right there in the dirt holes.
Here is the thing about squirrels that makes them such maddening adversaries: they are not actually trying to get to your chickens. That is almost the frustrating part. Squirrels dig because that is literally what they do. They are nature's tiny excavators, and your beautifully landscaped run perimeter is just another construction site to them. The real concern is not so much predation as it is structural compromise and opportunistic pests. Once a squirrel opens up a tunnel, you have created an invitation for rats, mice, and even actual predators who will absolutely take advantage of that gap. So the fear of the holes is not irrational at all. It is actually a very legitimate concern about cascading problems that start small and snowball fast.
What makes this particular battle so exhausting is the whack-a-mole nature of it. You fill one hole, and three more appear by the next morning. Cement blocks work temporarily, but squirrels are persistent engineers who will simply tunnel around the obstruction. Hardware cloth buried deep helps, but if there is any gap or weakness, they will exploit it with the determination of a heist crew scouting a bank vault. The dual electric fence is a solid move for keeping larger predators at bay, but squirrels are so small and so nimble that they can often slip through or simply go under where the current is weaker at ground level. The real game-changer tends to be a combination approach: extending that hardware cloth skirt further outward underground, using an L-footer design that bends outward beneath the surface to discourage digging, and removing every possible food attractant so the area simply is not worth their time anymore.
What we think is worth reflecting on here is the bigger picture of coop security as an ongoing project rather than a one-time build. So many chicken keepers treat their run and coop construction as a finish-it-and-forget-it situation, but the reality is that wildlife is constantly testing your defenses. Squirrels are just the visible tip of that pressure. Keeping a regular inspection routine, reinforcing weak spots before they become problems, and staying connected with other keepers who share their rodent woes can save a lot of headaches down the road.
So here is the question we want to leave you with: if you could redesign your run from scratch with everything you know now, what is the one change you would make first to finally outsmart those squirrels for good? Because honestly, we think the entire chicken-keeping community could benefit from hearing your hard-earned wisdom.