How to Predator-Proof Your Chicken Coop and Run

A predator-proof coop needs five things: hardware cloth over every opening, a buried or flat-apron skirt around the perimeter, latches a raccoon cannot manipulate, a covered run, and a door that closes before dark. Most flock losses happen because one of those five was missing. This guide covers each in order of how often they cause losses, plus the ventilation-opening detail most builders overlook.

The Most Common Predators and How They Get In

Knowing what you are defending against changes how you build. The threats vary by region, but these five account for the vast majority of backyard flock losses in North America:

Raccoons are the most frequent coop killer. They are strong enough to pull light wire apart at the seams, patient enough to work a simple latch for several minutes, and active at dusk and dawn when many doors are still open. They reach through openings and pull birds toward the wire.

Foxes dig. A fox will work under a run wall that sits directly on the soil and shows no sign of effort the next morning.

Weasels and mink are small enough to enter through any opening larger than one inch. They kill multiple birds in a single visit. A weasel attack looks like a massacre with no obvious entry point because the entry point is a gap most people would ignore.

Hawks take birds in open, uncovered runs. Red-tailed hawks are protected under the Migratory Bird Treaty Act, so the only legal defense is a physical barrier overhead.

Dogs, including neighbor dogs, account for a significant share of daytime losses. A determined dog can breach chicken wire in seconds.

Hardware Cloth vs Chicken Wire

Chicken wire keeps chickens in. It does not keep predators out. The hexagonal openings are too large, and the wire itself is thin enough to be torn by a raccoon or chewed through by a determined dog or weasel.

The correct material is galvanized 1/2-inch hardware cloth. It is welded at every intersection rather than twisted, which means it holds under pressure. The 1/2-inch openings stop weasels. Galvanized coating resists rust from moisture and manure exposure.

Use it on every wall panel, every window, every ventilation opening. Staples are not enough to hold it at the frame. Use screws with fender washers every 6 to 8 inches along the perimeter of each panel so the cloth cannot be peeled away at the edge.

19-gauge is the standard minimum. 16-gauge costs more and is worth it on the lower two feet of any run wall, where digging predators are most likely to push against the wire while working the soil below.

How to Stop Predators from Digging Under the Run

A run that sits on bare soil needs a skirt or apron. There are two approaches, and both work:

Buried wire: Dig a trench 12 inches deep around the perimeter of the run and attach hardware cloth to the bottom of the run wall, bending it 90 degrees outward at the bottom of the trench. Backfill over it. Predators dig straight down at the wall and hit the wire before they reach open ground.

Flat apron: Attach a 12-to-18-inch strip of hardware cloth to the base of the run wall and lay it flat on the soil, extending outward away from the run. Secure it with landscape staples or heavy rocks. Predators dig at the wall, hit the apron, and cannot get past it because they dig down, not back. This method requires no trench and is faster to install on established runs.

Concrete footings work but are overkill for most backyard situations and make future modifications difficult.

Latches Raccoons Cannot Open

A raccoon has the dexterity to work standard slide-bolt latches, hook-and-eye fasteners, and basic twist knobs. It may take several visits before it succeeds, but it will succeed.

Two-step latches that require opposing hand motions to open stop raccoons. A carabiner threaded through a hasp does the same job. Spring-loaded bolt latches with a secondary clip also work.

Every door on the coop and run needs this treatment, including pop doors, egg doors, and any access panel for the feeder. One latch that a raccoon can open is one too many.

An automatic door closer timed to close at dusk removes the single most common keeper error: forgetting to close the pop door before the raccoon starts its rounds. Solar-powered openers with light sensors are reliable and cost less than losing half a flock.

Covering the Run

An uncovered run loses birds to hawks in areas with active raptor populations and to climbing predators, including raccoons and fisher cats, that can scale most run walls.

Cover options in order of cost and durability:

Welded wire or hardware cloth roof: The most secure. Attach it to a frame at the top of the run walls. Hardware cloth is overkill for the roof in most situations; 1-inch welded wire is adequate since hawks cannot fit through it and the animals most likely to test it from above are heavier predators that will not make it past the side walls anyway.

Heavy-gauge bird netting: Less expensive and easier to install. It deters hawks effectively but will not stop a determined climbing predator. Adequate in low-predator-pressure areas.

Solid roof on part of the run: Common where shade and weather protection are also priorities. Leaves the remaining section open, which is a vulnerability if the open section is accessible from above.

Ventilation Openings Need Hardware Cloth Too

This is where coop safety and coop ventilation intersect. Every vent, gable opening, and window that stays open overnight needs to be covered with 1/2-inch hardware cloth before it is an air gap.

A well-ventilated coop requires significant open area. The University of Kentucky Cooperative Extension Service guideline puts summer airflow at 5 CFM per adult hen. Meeting that target means real openings, not cracks. Hardware cloth over those openings lets air through freely while keeping weasels, raccoons, and snakes out.

Do not substitute window screen for hardware cloth on ventilation openings. Screen does not stop anything with intent. If the opening is large enough to matter for airflow, it is large enough for a predator to exploit.

Use the ventilation calculator to size your total vent area, then plan hardware cloth coverage for every opening before you build.

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FAQ

What is the best wire for a chicken coop run? Galvanized 1/2-inch hardware cloth. It is welded at every intersection rather than twisted, stops weasels, and resists tearing better than chicken wire. Use 16-gauge on the lower two feet where digging pressure is highest. Secure every panel with screws and fender washers, not staples, along the frame perimeter.

Do I really need to bury wire under the run? Yes, if you have foxes, coyotes, skunks, or dogs in your area. A flat apron laid 12 to 18 inches outward from the base of the run wall is equivalent to buried wire and requires no trenching. Predators dig straight down at the wall and cannot reach under the apron.

What kind of latch keeps raccoons out? Two-step latches that require opposing motions to open, carabiners through a hasp, or spring-bolt latches with a secondary clip. Standard slide bolts and hook-and-eye fasteners are not raccoon-proof. An automatic pop-door closer removes the human-error risk of a door left open after dusk.

Can I use bird netting instead of wire to cover the run? Bird netting deters hawks, which is its main job. It will not stop a raccoon, fisher cat, or determined dog that can climb or push through netting under enough pressure. For areas with climbing predator pressure, use welded wire over the run roof.

Does hardware cloth on ventilation openings reduce airflow? No measurably. The wire openings in 1/2-inch hardware cloth add very little resistance to air movement. A vent covered with hardware cloth passes nearly as much air as an open vent of the same size. It is the correct material for any ventilation opening that stays open overnight.