How to Introduce New Hens to Your Flock

Why a Slow Introduction Pays Off

Few things in chicken keeping are quite as satisfying as watching a new hen settle into your flock, but the temptation to simply pop her in with the others is worth resisting. Chickens are deeply territorial. An established flock has a settled pecking order, shared dust baths, favourite perches and a routine that runs like clockwork, and a stranger dropped into the middle of it disrupts all of that at once. The result is usually bullying, stress, poor laying and, occasionally, genuine injury.

The good news is that a patient introduction almost always works. Give the birds time to get used to each other's sight, sound and smell before they have to share a metre of run, and you will see far less fighting. The whole process takes around four to six weeks from arrival to full integration, and it is worth every day. Try to begin in spring or early summer if you can — birds integrate more easily when they are not moulting or battling freezing weather.

One golden rule before you start: introduce at least two new hens at a time. A single newcomer has no ally and becomes the target for every bird in the flock. Two or three give each other confidence and spread the attention.

Step One: Quarantine for Three to Four Weeks

Never skip this. New birds can carry respiratory infections, mites, lice, worms and coccidiosis without showing obvious signs, and these can sweep through your existing flock within days. Keep new arrivals in a separate coop and run, ideally as far from your main birds as your garden allows — at least ten metres if possible, and out of the same airflow.

During quarantine:

• Use dedicated feeders, drinkers, boots, gloves and tools. Do not share anything between pens.
• Attend to your existing flock first each day, then the newcomers, and wash your hands thoroughly afterwards.
• Check new birds daily for laboured breathing, sneezing, runny eyes or nose, scaly legs, pale combs and lice or mites around the vent.
• Dust for external parasites and worm them if they have not been treated recently, following the product instructions carefully.
• Ask where they came from and what they have been vaccinated against, if anything.

If anything suspicious appears, extend quarantine and speak to your vet before mixing. A vet trip is far cheaper than losing half your flock.

Step Two: See But Don't Touch

Once quarantine is complete, move the new hens somewhere they can be seen and heard by the main flock but not reached. A partitioned section of the run, a temporary pen alongside the coop, or a small ark next to the main run all work well. Use sturdy weld mesh rather than chicken wire — determined birds will push through flimsy netting, and you want noses to meet without beaks doing damage.

Leave them like this for one to two weeks. This is a surprisingly busy period: the birds spend hours sizing each other up through the wire. Place feeders and drinkers along the dividing fence on both sides so the two groups eat and drink close together, which builds familiarity fast. Scatter a few treats — corn, sunflower hearts, a handful of greens — along the barrier each afternoon so being near each other becomes a positive experience.

Step Three: Supervised Mixing

When the through-the-wire behaviour settles down and nobody is charging the fence any more, it is time for supervised contact. Open the divide for short periods, ideally in the late afternoon when birds are calmer and there is plenty of space outdoors for a newcomer to retreat.

Stay and watch. A certain amount of chasing, a sharp peck on the back of the neck and a bit of posturing is normal — that is the pecking order being renegotiated. A chase that ends with the new hen moving away and being left alone is fine. Relentless pursuit, cornering, or any blood drawn is not, and you should separate them and go back a stage.

Scatter food over a wide area so no bird can guard it, and add extra feeders, drinkers, perches and dust baths. Distraction and escape routes are your best tools.

Step Four: Moving In Together

After a week or more of peaceful afternoons together, it is usually safe to let them share housing. Do the move at dusk: lift the new hens onto the perch in the main coop once the others have settled and are drowsy. Waking up together is far less confrontational than a daytime arrival.

Check the coop is properly set up for extra birds:

• At least 25cm of perch per hen, and ideally perches at different heights.
• One nest box per four to five hens.
• Roughly 25cm of trough feeder space per bird, or one tube feeder per six hens.
• Plenty of room in the run — a square metre per bird is the minimum, and twice that makes integration far easier.

Expect a bit of jostling on the first morning. If it stays noisy but bloodless, leave them to sort it out while you keep an eye from a distance.

Troubleshooting Common Setbacks

Bullying can flare up weeks later, particularly when a bird comes back into lay or the weather traps everyone inside. Hang cabbage or a pecking block in the run, add obstacles such as pallets, planters and hanging CDs to break sightlines, and provide a second dust bath well away from the first.

Watch for a hen who hides, stops eating, or perches alone at night — those are signs of a bird being kept away from food and warmth. Separate her for a few days' rest, then reintroduce her at dusk alongside a calm companion. If one particular hen is a persistent tyrant, removing her from the flock for a week and reintroducing her as the newcomer often resets the balance.

Above all, be patient. Most flocks sort themselves out within a month, and the morning you find all your hens dust bathing together in one contented heap makes every week of careful shuffling worthwhile.