Snakes enter chicken coops through gaps in wire, under doors, and through holes in wood—and they stay because they find eggs or chicks to eat

The fastest way to stop snakes is to eliminate their entry points and remove what attracts them. Snakes need an opening smaller than a pencil to squeeze through, so your first step is a walk around the coop's perimeter with a flashlight, checking the base where the coop meets the ground, around door frames, and along any wire mesh. Gaps wider than a quarter-inch will let a snake in. At the same time, remove anything that makes the coop appealing: collect eggs daily so snakes have no reason to stay, keep rodent populations down (snakes eat rodents as much as they eat eggs), and store feed in sealed metal containers rather than open bags.

The second step is understanding which snakes are in your area and whether they pose a real threat. Rat snakes and garter snakes eat eggs and occasionally chicks but are not aggressive toward adult birds. Venomous snakes like copperheads or rattlesnakes are rare around coops and typically only pass through. Most snakes that enter a coop are after rodents, not poultry. If you see a snake in or near the coop, the goal is exclusion—keeping it out—not removal or killing, because snakes control the rodent population that would otherwise destroy your feed and spread disease.

Key Takeaways

  • Seal all gaps larger than a quarter-inch around the coop base, door frames, and wire mesh, because snakes can enter through openings smaller than a pencil.
  • Collect eggs daily and store feed in sealed metal containers to remove the food sources that attract snakes to the coop in the first place.
  • Bury hardware cloth at least six inches deep around the coop perimeter to block snakes from burrowing underneath the structure.
  • Install a one-way door or exclusion funnel if a snake is already inside, so it can leave but cannot return.
  • Keep grass and brush trimmed around the coop because snakes use tall vegetation as cover when hunting for entry points.

Seal the coop base with hardware cloth buried underground

Hardware cloth (a wire mesh finer than chicken wire) is the most effective barrier because snakes cannot chew through it and it blocks burrowing snakes from tunneling under the coop. Start by running hardware cloth around the entire perimeter of the coop, at least two feet high on the outside wall. Attach it to the wooden frame with staples every three to four inches, pulling it tight so there are no gaps or loose edges a snake could work under.

The critical step is burying the cloth. Dig a trench six inches deep around the base of the coop, lay the hardware cloth into it, and backfill with soil. Bend the cloth outward at the bottom of the trench so it forms an L-shape—this prevents snakes from digging straight down and then back under. If digging is not possible (rocky ground, concrete), lay the cloth flat on the ground extending at least two feet out from the coop and find it with landscape staples or rocks. Snakes will not cross this barrier if they cannot find an edge to lift.

Close gaps around doors, vents, and wire mesh

Doors are the easiest entry point because they are opened and closed daily, creating gaps. Install a door sweep or rubber gasket along the bottom edge so the door closes flush against the frame with no space underneath. Check the fit by shining a flashlight from inside the coop at night—if you see light around the edges, the gap is large enough for a snake.

Vents and pop doors (small automatic doors that open at dawn) need the same treatment. Wrap hardware cloth around vent openings on the inside of the coop, securing it with staples. For pop doors, install hardware cloth over the opening on the outside so air still flows but snakes cannot enter. If your coop has large chicken wire instead of hardware cloth, replace it with hardware cloth or add a layer of hardware cloth over the existing wire. Chicken wire keeps chickens in but does not keep snakes out—the mesh is too large.

Inspect wooden frames and boards for cracks and holes. Fill small gaps with caulk rated for outdoor use. For larger holes or rotted wood, cut out the damaged section and replace it with new wood, then seal all edges with caulk or hardware cloth stapled over the opening.

Remove food sources that attract snakes to the coop

Snakes are drawn to chicken coops for two reasons: eggs and rodents. Collect eggs at least once daily, ideally in the morning before snakes are most active (late afternoon and evening). Do not leave eggs in nest boxes overnight. If you have broody hens sitting on eggs, move them to a separate enclosure with hardware cloth flooring so snakes cannot access the eggs from underneath.

Rodents are the second attraction. Snakes eat mice and rats, so a coop with a rodent problem is a coop snakes will visit repeatedly. Store all feed in sealed metal containers with tight-fitting lids—plastic containers can be chewed through. Do not leave feed on the ground or in open bags. Sweep up spilled grain daily. Remove any brush piles, wood stacks, or dense vegetation within ten feet of the coop because these are rodent habitats. The fewer rodents near the coop, the fewer snakes will have a reason to hunt there.

Keep the area around the coop clear and well-lit

Snakes use tall grass and brush as cover when approaching the coop. Mow or trim grass within at least three feet of the coop perimeter down to two inches or shorter. Remove fallen branches, leaf piles, and dense shrubs. This removes hiding spots and makes snakes more visible if they do approach, which deters them—snakes prefer to move undetected.

Install motion-activated lights around the coop if snakes are active at night. Snakes are not afraid of light, but they are less likely to approach an area where they feel exposed. Lights also help you spot snakes before they enter. If you keep the coop lit at night to extend laying season, use a timer so the light is not on constantly—this can stress the birds and disrupt their natural rhythm.

What to do if a snake is already inside the coop

Do not kill the snake unless it is venomous and poses a direct threat to you. Most snakes in coops are harmless and will leave on their own once they realize there is no food. If the snake is still there after 24 hours, use a one-way exclusion door or funnel to let it leave without returning. You can buy exclusion funnels online or make one from PVC pipe: cut a section of four-inch PVC about eight inches long, cut it lengthwise, and tape it over the snake's most likely exit point (usually near ground level). The snake can push its way out but the funnel prevents it from re-entering.

If you need to remove the snake by hand, use a broom to gently guide it toward an open door or window. Wear gloves and move slowly—snakes are more afraid of you than you are of them. Once it leaves, when ready seal the gap it used to enter. If you are uncomfortable handling the snake, contact a local wildlife removal service. Many will relocate the snake for a small fee.

Frequently Asked Questions

Will mothballs or ammonia keep snakes away from the coop?

No. Mothballs and ammonia-soaked rags are often recommended but do not work—snakes have poor senses of smell and will ignore these odors. The only effective deterrent is physical exclusion: sealing gaps and removing food sources. Spend your effort on hardware cloth and door sweeps instead.

Can I use chicken wire instead of hardware cloth?

Chicken wire will keep your chickens inside the coop but will not keep snakes out. The mesh openings are too large. Use hardware cloth (one-quarter-inch mesh or smaller) for the perimeter and any areas where snakes could enter. Chicken wire can be used for the roof or upper walls where snakes are less likely to climb.

Do I need to worry about snakes if I have a raised coop?

Raised coops are safer but not snake-proof. Snakes can climb wooden legs and enter through gaps in the floor or walls. Still seal all openings with hardware cloth and bury cloth around the base if the coop is low enough for snakes to reach. Check underneath the coop regularly for snakes that may be sheltering there.

What time of year are snakes most active around chicken coops?

Snakes are most active in spring and early fall when temperatures are warm but not extreme. However, snakes can enter coops year-round in warm climates. Seal your coop before spring arrives so you are not playing catch-up once snakes are actively hunting.

If I see a snake near the coop, should I kill it?

Not unless it is venomous and poses a direct threat. Most snakes near coops are rat snakes or garter snakes, which are harmless to adult chickens and actually help control rodents. If the snake is not inside the coop, leave it alone. If it enters the coop, use an exclusion funnel to let it leave, then seal the entry point.