Automatic Chicken Coop Doors: Opening Size, Power and Modes

Pick an automatic coop door by opening size first. The doors below run from 8.2 × 9.6 in to an XL 10.8 × 14.2 in, so measure your biggest hen and add a few inches. Then choose battery or solar power, and timer or light-sensor mode.

An automatic door closes the coop at dusk and opens it in the morning, even when you are late home. Kentucky Extension says to have the flock roost inside a secured place at night, with all doors closed and locked. A door that does that on its own is the single most useful coop upgrade.

Each box below lists the opening, the power source and the modes, taken from the maker listing. Read the opening size first. A door that is too small for your biggest hen will not get used.

The chart shows how much the sizes differ. The FabStyl XL lists nearly twice the area of the NyPots opening. For bantams and light hens, the smaller door is plenty. For Orpingtons and other big birds, go for the larger size.

Penn State reminds keepers to make doorways large enough for birds to move through easily. A hen should walk through without ducking. Measure your biggest hen standing, from the floor to the top of her back, and add a few inches.

Hen weight is a rough guide to size. A Sebright bantam hen weighs about 20 oz, by Oklahoma State. A Leghorn hen weighs about 4.5 lb, and a Plymouth Rock 7.5 lb, by The Livestock Conservancy. An Orpington hen weighs about 8 lb, by Oklahoma State.

The NyPots door lists poultry under 10 lb, so on weight alone it covers all four. Height is the real limit, though. Its 9.6 in opening is well under the 14.2 in XL door. Big, fluffy birds pass more easily through the taller door.

For standard hens and bantams, the NyPots solar door is a compact choice. Its opening is 8.2 in wide and 9.6 in high, and the maker says it suits poultry under 10 lb. A built-in battery charges from the panel, so there are no batteries to swap.

Solar doors need a sunny spot for the panel. Mount the panel on the south side of the coop or on a short pole. In a shady yard, a battery door may be the simpler choice.

For a taller pop door, the fophop large door opens 9.45 in wide and 10.83 in high. Its 4000 mAh battery charges from the panel or a USB-C cable. It has a timer, a light sensor and a remote, plus anti-pinch, which reopens the door if it meets resistance.

For Orpingtons, Brahmas and other big birds, pick the largest door you can fit. FabStyl lists its XL door at 10.8 × 14.2 in, for larger chickens, ducks and geese. It runs on solar with a USB-C backup, and it stops and reverses if it meets resistance while closing.

Large doors need a big wall. Check the space above or beside your pop hole before you order. Then do a test run each fall: watch the door close and open on its schedule, and check that nothing in the track stops it. Brush out bedding and droppings from the bottom of the frame at the same time, and wipe the solar panel clean.

A battery door needs no panel or cable. The LCD door below runs on 3 AA batteries, which come in the box, and flashes a low-battery light when they need changing. You set open and close times on its screen. It reverses if it meets resistance.

Keep spare batteries in the feed store, and change them before winter. Write the date on the battery cover, so you know when the next set is due. Cold weeks drain batteries faster, so check the door more often in January.

The RUN-CHICKEN T50 is a battery door with an app. You can run it on a timer or a light sensor, and change the settings from your phone. The maker says it mounts with six screws and is tested from –15°F to 140°F. It has an anti-pinch sensor too.

A timer opens and closes at set times. It is predictable, but you have to change the times as the seasons shift. A light sensor follows the sun, so the door closes at dusk in every season. Most doors here offer both.

Many keepers use the light sensor to close and a timer to open. That keeps hens in until a sensible hour in summer, when the sun rises very early, and still closes the door at dusk.

Cut or size the pop hole to match the opening. Mount the door on the inside of the coop where you can, so the motor stays dry. Run the light sensor or solar panel outside, facing open sky.

Watch the first few evenings. Kentucky Extension notes that most poultry can be trained to go in at dusk by feeding or watering them indoors. Count the hens before the door closes, and adjust the close time if one is still outside.

Keep a manual habit too. Check the door is shut on your evening walk. An automatic door is a helper, not a replacement for a quick look. Pair it with a latch on the people door that takes two motions to open.

Clean the track every few weeks. Bedding and droppings can build up in the bottom of the frame and stop the door from closing fully. A quick brush keeps it running.

Battery doors are simple. They work in shade and in any weather. The trade-off is swapping batteries. Write the date on the battery cover when you change them, so you know when the next set is due.

Solar doors need sun on the panel. In short winter days, a panel in shade may not keep up. Clear snow off the panel after a storm. Point it south, and keep branches trimmed back. A solar door in full sun runs for years with little care.

Cold is hard on every battery. A door that runs fine in October may slow in January. Check it more often in the coldest weeks. If it stalls, warm the batteries indoors or fit fresh ones.

Most pop doors sit low on a side wall, with a short ramp to the run. Penn State suggests ramps with slats about 3 in apart, or a textured surface, so hens get good footing. An automatic door fits the same spot.

Put the door on the side away from the worst weather. Wind-driven rain and snow can freeze a sliding door in its track. A small roof over the door helps a lot. So does a door on the inside of the wall.

If the door opens into a covered run, the hens are safe even when it opens at dawn. If it opens straight onto the yard, set the open time a little later, after full light. Kentucky Extension notes that some predators hunt in the hours around dawn and dusk.

Most flocks learn the routine in a few days. Hens head to the roost at dusk, and the door closes behind them. If one hen lingers outside, she learns fast after a night or two of waiting for you. Check the count for the first week.

New birds take a little longer. Keep them in the coop for a few days before you let them out, so they learn where home is. Then let them follow the older hens in at dusk.

Keep the coop interior dim at night and the run free of feed. Kentucky Extension says not to leave feed in the run at night, since it draws predators. That habit pairs well with an automatic door.

Read four things on any door listing. The opening size, in width and height. The power source and how long the batteries last. The modes, such as timer, light sensor and remote. And whether a door is included or only the opener.

Check the weather rating if the door mounts outside. Look for a self-locking or auto-stop feature. These details matter more than the color or the brand name.

Read the manual before the door arrives, if the maker posts it online. It shows the mounting holes, the clearance above or beside the opening and the battery type. Ten minutes with the manual saves a second trip to the store. Measure twice, with the coop wall in front of you, and mark the cut lines in pencil before you pick up a saw.