Feathers are the clearest readiness signal
A chick regulates its temperature properly only once real feathers have replaced its down, which for most breeds happens at around six weeks. Look over each bird individually: wings, back, chest, and neck should be feathered, not patched with fluff, because the slowest bird in the group sets the safe moving date for all of them. Fast-feathering breeds may be ready slightly sooner and large or slow-maturing breeds later. If nights are still cold, even well-feathered youngsters benefit from waiting, since a chill at this age can set growth back.
Prepare the coop before moving day
The coop should be finished, not nearly finished, before chicks arrive in it. Check for gaps small predators can squeeze through, secure latches, dry bedding, and ventilation that moves air without blasting the birds with a draught at roost height. Set perches low at first and place feed and water where young birds can reach without climbing or competing. If older hens already live there, plan how introductions will be handled, ideally with a see-but-not-touch period, because bullying at feeders is the commonest problem in a mixed-age move.
The first days and nights outside
Move chicks on a calm, mild morning so they have a full day to explore before dark. Many keepers keep new youngsters shut in the coop for the first few days so they fix on it as home, then open the run. Go out at dusk for the first week or so: chicks often huddle in a corner on the ground instead of roosting, and may need lifting onto perches and guiding inside until the routine clicks. Watch the weather and bring a heat source plan back into play if an unexpected cold snap catches birds that are only just feathered.
Short trial outings before the permanent move
If the weather allows, give nearly feathered chicks brief supervised outings to the run before moving day, then bring them back to the brooder. An hour or two on grass teaches them the ground, the drinker position, and the sound of the coop area while the safety of the brooder is still theirs at night. Chicks that have already scratched, dust-bathed, and found their way back to you in the run treat the permanent move as a longer version of something familiar, not an eviction. Keep those trial birds within a fenced area and stay nearby, because a loose chick is defenceless and surprisingly hard to catch once it decides the hedge is home.
Watching for trouble after the move
Check that every chick is eating and drinking in the new setup, since a bird that knew the brooder layout can still fail to find a moved feeder. Huddling tightly together away from the pop hole suggests cold or fear, while birds spread out and active suggest comfort. Look daily for pasty droppings, drooping wings, or a chick being kept away from feed by companions. Contact a veterinarian or experienced poultry adviser promptly if several birds become fluffed, quiet, and off their feed, as young birds decline fast. Through KinsLe, the dusk rounds, feeder refills, and bedding changes of that first outdoor fortnight can be handed out as Care Teams tasks, so nothing in the settling-in routine depends on one person's memory.