Setting Up the Coop for Growing Birds
The Growing Flock — Part 1 of 8
Your young birds are settled in the coop and sorted out with the older flock. Then, somewhere around eight weeks, you notice the coop looks smaller than it did a fortnight ago.
That's not your imagination. Between eight weeks and point of lay a pullet roughly triples in body weight, and the coop that suited them on move-in day is one they're actively outgrowing.
The good news is that almost everything needing adjustment is straightforward, and better done now, while the birds are young and adaptable, than later when habits are set.
Perches: Height, Spacing, and the Great Nightly Argument
Young birds start roosting properly between six and ten weeks, and once they do they take it seriously. It's a deep instinct — up off the ground, away from whatever might be prowling around at night.
Aim for about 20 to 25cm of perch space per bird. Then accept that they'll all pile onto the highest perch anyway.
Perch height is how the pecking order gets displayed. The top birds take the top spot, and everyone else crams in alongside trying to get as high as they can — eight birds squeezed onto a perch meant for four, with a perfectly good lower perch sitting empty.
That's normal, but worth managing, because constant crowding means squabbling and birds knocked off in the dark. Three things help:
- Stagger your perches at different heights rather than making one obviously superior. A ladder arrangement gives lower-ranked birds somewhere acceptable to go.
- Give generous total perch length, so even the popular top perch can hold the birds that want it.
- Never place one perch directly above another, or the birds underneath will wear the consequences all night.
Flat Timber Beats Round Dowel
A chicken's foot doesn't grip like a wild bird's. When a chicken roosts the foot stays largely flat and the body settles down over the toes — that's how they keep their feet warm through a cold night.
A round dowel forces the foot to curl awkwardly and leaves the toes exposed underneath, which over months contributes to sore joints and foot problems.
Flat-topped timber — around 50 x 50mm or 70 x 45mm with the sharp edges sanded off — lets the foot sit naturally and the breast feathers cover the toes. Timber also stays warmer to the touch than metal on a frosty Victorian morning.
If you're adding roosting bars or things to climb on, the perches and enrichment range is a good place to start. Growing birds are busy birds, and a few extra levels takes real pressure off the pecking order.
Floor Space Grows With the Bird
Space requirements aren't fixed — they scale with the size of the bird standing in it.
As a working guide, around 0.3 to 0.4 square metres of coop floor per standard-sized bird gives room to move as they finish growing. Bantams need less; heavy breeds like Orpingtons or Australorps want the upper end.
That's indoor space. Run space is separate and more generous — figure on at least a square metre per bird outside, and more if they aren't free-ranging.
Crowding causes a surprising number of problems people blame on something else. Feather pecking, bullying, damp litter, respiratory trouble — a lot of it traces back to too many birds in too little room. So if you're on the edge of the numbers now, plan for the size they'll be at twenty weeks.
Fit Nest Boxes Long Before You Need Them
Pullets won't lay for months yet, so it's tempting to leave the nest boxes until closer to the time. Fit them now instead.
The reason is behavioural. A pullet coming into lay is working on instinct with no experience behind it, and she'll look for somewhere dark, private and familiar. If the boxes have always been part of her world, she's far more likely to use them.
Install them late and you've added a strange new object right when she's making that decision — which is how you end up hunting for eggs under the hedge.
- Allow roughly one box per three to four hens. They'll mostly queue for the same favourite regardless, but the spares matter on busy mornings.
- Position boxes lower than the lowest perch. If a box is the highest spot in the coop, they'll roost in it and foul it nightly.
- Keep them shaded and private. A curtain or a lip across the front helps enormously.
Whether you want a simple timber box or a roll-away design, the nesting boxes collection has options to suit most coop layouts. And if you find pullets sleeping in the boxes, lift them onto the perch at dusk for a few nights — they usually take the hint at this age.
Ventilation High, Draught-Free Low
This is the most misunderstood part of coop design, and getting it right prevents more illness than almost anything else you'll do.
A coop full of growing birds produces a remarkable amount of moisture — from breathing, and far more from droppings. That warm, ammonia-laden air rises, and if it has nowhere to go it condenses on the roof and rains back down on your flock all night.
So you want ventilation well above roosting height — vents or mesh openings under the eaves or high on the gable ends. What you don't want is draught at bird level, cold air moving across roosting birds and ruffling feathers apart.
The simple test: stand where the birds roost on a windy night. Still air on your face, plus daylight through vents up high, means you've got it right.
Cold Isn't the Enemy. Damp Is.
Chickens handle cold remarkably well. A healthy bird in full feather is wearing an excellent down jacket, and a Victorian winter is well within what they're built for.
Damp is different. Moisture flattens feathers and destroys their insulating value, so a damp bird at 5°C is in far more trouble than a dry bird at 0°C. Damp bedding also drives ammonia, which irritates the airways.
That's why sealing a coop tight to keep them warm backfires — you trap the moisture in with them. Ventilate generously, block the draughts, and let them wear their own coats.
Litter: What to Use and How Deep
Litter absorbs moisture, cushions the landing off the perch, and gives the birds something to scratch through.
Good options include pine shavings (absorbent, low dust, easy to turn), chopped straw (warm and comfortable, but watch it for damp), and hemp bedding (excellent absorbency and very low dust, though dearer).
Avoid fine sawdust, which is dusty enough to irritate airways, and avoid cedar shavings entirely — the oils are harsh on a bird's respiratory system.
Go deeper than feels necessary — around 10 to 15cm. A thin scattering just gets wet and packs down.
Design for the Way You'll Actually Clean It
The honest truth about coop design is that the coop you can clean easily is the coop that stays clean.
If cleaning means crawling through a low door on your knees with a scraper, it'll get done less often than it should — not because you don't care, but because life is busy. So think about the practical side while you're still setting up.
- Can you reach every corner? A large access door or lift-off roof section turns a half-hour job into a ten-minute one.
- Do the perches lift out? Perches dropped into brackets rather than screwed down make everything easier.
- Is there a droppings board? Most of the overnight mess lands under the perches, and catching it on a removable board is the highest-value change most people can make.
- Are surfaces smooth? Rough timber and crevices hold moisture and give mites somewhere to hide.
Make these changes now, while the coop is fresh and the birds are young. It's far easier than retrofitting around a flock in full lay, and it mostly comes down to seeing the coop through the eyes of a bird about to get considerably bigger.
What's Next?
Around this age the differences between your birds start becoming hard to ignore — a taller stance here, a bolder comb there. In Part 2, Pullet or Cockerel? And What to Do About the Boys, we'll look at how to tell them apart and what your options are when the answer isn't the one you hoped for.