Getting rid of rats in a chicken coop requires a combination of cutting off their food supply, sealing entry points, and actively removing the rats already living there. Doing just one of these things won’t solve the problem. Rats are persistent, cautious, and breed fast, so you need to hit them from multiple angles at the same time.
The challenge with a chicken coop is that many common rat control methods, especially poison, can harm or kill your birds. Everything below is tailored to work safely around poultry.
Remove Their Food Sources First
Rats don’t move into chicken coops because they like chickens. They move in because there’s a reliable, easy supply of grain. The single most impactful thing you can do is make feed inaccessible to rodents. If you skip this step, trapping and exclusion will only slow them down.
Store all chicken feed in galvanized metal containers with tight-fitting lids. Plastic bins won’t cut it. Rats chew through plastic easily, and even thick rubber storage totes are no match for their teeth. Galvanized steel cans come in sizes from 6 to 31 gallons and are widely available at farm supply stores.
Switch to a rodent-proof feeder design. The most effective versions use hooded ports or 90-degree PVC elbows that chickens can poke their heads into but rats cannot climb into. Elevating the feeder six to eight inches off the ground on a cinder block adds another layer of protection: rats trying to climb the block can’t get a grip on the smooth plastic body of the feeder, and their paws just slide around the surface. Mice can jump that height, but they jump straight up and down rather than up and over, so hooded ports stop them too.
Don’t leave feed sitting in open troughs overnight. Rats are most active after dark, and an open feeder is an open invitation. Bring feeders inside or switch to a treadle-style feeder that closes when chickens step off. Also pick up any spilled feed, fallen fruit, and scraps before dusk. Even compost piles near the coop can draw rats in.
Seal the Coop With Hardware Cloth
Rats can squeeze through openings as small as a quarter, and standard chicken wire does almost nothing to stop them. The material you need is 1/4-inch hardware cloth, which is a welded wire mesh with openings too small for rats or mice to pass through.
Cover all ventilation openings, windows, and any gaps in the coop walls with 1/4-inch hardware cloth. Pay special attention to where the coop meets the ground. Rats are excellent diggers, and burying hardware cloth isn’t always enough on its own. Some coop owners have found rats tunneling under mesh buried 18 inches deep. The most effective approach is to fully enclose the bottom, top, and sides of the run in 1/4-inch mesh, creating a complete barrier. If that’s not practical, an apron of hardware cloth extending outward from the base of the run at least two feet, laid flat just below the soil surface, will discourage most digging.
Check for gaps around doors, where roofing meets walls, and around any pipes or wires entering the coop. Stuff small gaps with steel wool or pack them with hardware mesh. Rats cannot chew through either material.
Set Traps the Right Way
Trapping works, but rats are naturally cautious and won’t approach something new right away. Place your traps along the edges of the chicken run, near walls, or beside outbuildings where you’ve noticed droppings or grease marks. These are established travel routes.
Here’s the key step most people skip: leave the traps out for several days without setting or baiting them. Let the rats get used to the traps as part of the landscape. After a few days, bait and set them. Peanut butter works better than cheese. Rats are strongly attracted to the smell, and a tiny smear is all you need.
For coops, enclosed trap stations are safer than open snap traps. Electric trap boxes are battery-powered and kill instantly when a rat steps on an internal metal plate. The enclosure is too small for chickens or pets to fit inside, which eliminates the risk of injuring your birds. Place snap traps inside a covered bait station or a length of PVC pipe if you don’t want to invest in electric traps. The goal is to let rats in while keeping chickens out.
Destroy Existing Burrows
If rats have already established burrows around your coop, you’ll need to deal with those directly. Look for entrance holes about two to three inches wide, often near the foundation of the coop, along fence lines, or under bushes. Active burrows typically have smooth, packed-down entrances with fresh dirt pushed out. Inactive ones will have leaves, cobwebs, or debris blocking the opening.
Before filling any burrow, make sure the rats are out. Sealing rats inside creates a decomposition problem you don’t want. The best time to fill burrows is during the day when rats are typically away foraging. Pack the main entry hole and all exit holes with steel wool or hardware mesh first, then fill with concrete or tightly packed sand. Rats can dig through loose soil, so the fill material needs to be something they can’t easily move or chew through.
Why You Should Avoid Poison
Rodenticides are risky around poultry. All rat poisons are toxic to chickens, livestock, wildlife, and humans at various levels. The danger isn’t just that a chicken might eat the bait directly. Secondary poisoning is a real concern: if a chicken eats a dying or dead rat, the toxins stored in the rat’s body can transfer to your bird and potentially into eggs.
Some poisons, like zinc phosphide, don’t accumulate in muscle tissue, which slightly reduces secondary poisoning risk. But the ingested poison remains active in the dead rat’s gut for several days, meaning any animal that eats the stomach contents of a recently poisoned rat can still be poisoned. In a chicken coop environment where you can’t control what your birds peck at, the risk is simply too high. Trapping and exclusion are safer and, when done thoroughly, just as effective.
Natural Deterrents Worth Trying
Rats depend heavily on their sense of smell to find food, communicate, navigate, and detect predators. Strong background odors interfere with all of these abilities, which is why scent-based deterrents can help discourage rats from settling in.
Mint is the most commonly used option around coops, and it’s safe for chickens. Plant mint around the perimeter of your coop and run. It grows aggressively in most climates and comes back every year, so once established it takes care of itself. Toss fresh mint leaves into the coop and nesting boxes regularly, and dry extra for use through winter. Peppermint essential oil on cotton balls works as a substitute in the off-season. Stuff saturated cotton balls into any rat holes you find in or around the run.
Cayenne pepper is another option that’s completely safe for poultry. Chickens lack the taste receptors for capsaicin, so they won’t notice it at all. A sprinkle of cayenne mixed into feed can help deter rodents from eating it. As a bonus, cayenne improves circulation in chickens, which may reduce the risk of frostbitten combs and wattles during cold months.
To be clear, mint and cayenne are supplements to your main strategy, not replacements. They make your coop less appealing to rats, but they won’t drive out an established colony on their own. Use them alongside feed management, exclusion, and trapping for the best results.
A Realistic Timeline
Expect this to take weeks, not days. Securing feed and sealing the coop should happen immediately. Traps need several days of pre-baiting before they’ll start catching cautious rats. Once trapping begins, you may catch the boldest rats within the first few nights, but the remaining ones will be warier. Keep traps active and re-bait regularly for at least two to three weeks. Monitor for new droppings, gnaw marks, or burrow activity. If signs persist after a month of consistent effort, you may be dealing with a larger population than traps alone can handle, and a professional pest control service experienced with agricultural settings can help without putting your flock at risk.