Young pullets moved straight from a grow-out pen into an established flock meet hens who defend feeders, roosts, and rank. A staged introduction respects that social reality: the birds learn each other's sight, sound, and smell before anyone can land a peck, and the pullets arrive big enough to hold their own.
Let Them Meet Through Wire First
House the pullets beside the adult flock, separated by wire or mesh, for a good settling period before mixing. They will study each other, dust-bathe within sight, and lose much of their novelty to each other. Use that time to be sure the pullets are healthy, eating confidently, and close in body size to the smaller hens — introducing much smaller, partly feathered birds invites trouble they cannot escape. Keep their grower feeding routine steady during this stage and handle them calmly so moving day is the only big change.
Prepare the Shared Space Before Mixing
On mixing day, more resources mean fewer fights. Put out extra feeding and watering stations in different spots so a hen guarding one cannot control them all, add visual breaks such as upturned crates, branches, or a pallet leaned safely, and scatter some feed widely so attention spreads across the ground. If the birds free-range, mixing them out on neutral ground with lots of space often goes more smoothly than releasing pullets into the hens' own coop. Many keepers slip pullets onto the roost at dusk, when birds are sleepy and less reactive, then are present early the next morning when the real sorting-out begins.
Supervise the First Days Closely
Some chasing and brief pecking as rank is negotiated is normal; what is not acceptable is a bird pinned in a corner, repeated attacks drawing blood, or pullets too frightened to reach feed and water at all. Watch at the busy times — first release, feeding, and roosting — because those are when pressure peaks. A pullet that learns where the escape routes and second feeder are will usually gain confidence within days. If one hen is the relentless aggressor, removing her for a few days to reset her standing often works better than removing the victims.
Protect Feed, Water and Rest While Rank Settles
Check crops at dusk: a pullet going to roost with an empty crop has been kept from feed and needs a separate quiet feed or an extra station placed where she actually spends time. Keep a temporary pen ready so an injured or overwhelmed bird can recover within sight of the flock, which makes her later return far easier than a long absence. Avoid adding new birds, moving housing, or other flock changes during the same week — stack no extra stress on top of the introduction.
Know When to Step Back In
Separate any bird with an open wound immediately, since hens peck at blood and a small injury escalates quickly. If several pullets are losing weight, hiding all day, or the violence is not easing after the first settling days, go back a step to wire-separated housing and retry with bigger pullets, more space, or smaller sub-groups. A patient second attempt is cheaper than injured birds.
Introductions succeed on watched details — crops at dusk, water reached, bullies noticed — and KinsLe's Care Teams can hand those dawn and evening flock checks to different helpers as timestamped duties until the pullets are fully part of the flock.