Short answer: Most layer pullets start laying between 18 and 20 weeks of age, and many brown hybrids reach their first eggs around 18 to 19 weeks, with the flock at about half production by roughly 20 weeks. Good timing depends on body weight at point of lay, a planned change from grower to pre-lay and layer feed, and a light programme that does not change suddenly. The physical signs of approaching lay usually appear a week or two before the first egg, so watch for them and prepare early. A late or early start almost always traces back to weight, feed, light, stress or disease, and each of those can be checked.
Key takeaways
- Expect first eggs at about 18 to 20 weeks, but let the body, not the calendar, set the switch to layer feed.
- Body weight at point of lay is the best single predictor of a good start, so weigh pullets every week.
- Change to pre-lay and then layer feed on a planned schedule, with calcium introduced correctly.
- Pullets show signs of approaching lay one to two weeks before the first egg, so watch for them.
- Early and late starts have causes you can track and correct, usually in weight, feed, light or health.
Typical ages for first eggs in Ghana
Most layer pullets lay their first egg between 18 and 20 weeks of age. Brown hybrids commonly start around 18 to 19 weeks, and many flocks reach half production by about 20 weeks, according to the breeders' published targets. White-egg hybrids often start a little earlier. The exact window depends on the strain, so check the breeder's guide for the line you are raising. Our breed overview lists the lines we supply.
Think about the flock as a group. Individual birds start at different times, and the first eggs from a flock often come in a trickle over several days. What matters is the flock average, and whether the first eggs arrive within the breeder's window. A flock that starts two or three weeks late is a management question, not a bad surprise, and it can usually be traced to something you can measure.
If you buy day-old chicks, you will be raising them for about 18 weeks before the first egg. That is a long time to keep a house, feed and labour ready, so plan the timeline backwards from the expected first egg. Delivery options are on our delivery page. Our layer chicks page describes the lines we supply, and the Hy-Line Brown guide sets out what a typical rearing period looks like for that line. If you are ready to start, the order form is on our homepage.
Signs your pullets are about to lay
The body gives clear signals before the first egg, and learning them lets you prepare the house and feed in time. None of these signs is conclusive on its own. Look for several together, and check the flock regularly rather than once a week.
- Comb and wattles: they redden, enlarge and become firm as hormone levels rise.
- Pelvic bones: the gap between the pelvic bones widens. Check it by hand on a sample of birds, comparing with the breeder's guidance.
- Vent: the area around the vent becomes moister and looser as the reproductive tract develops.
- Squatting: a pullet that crouches and stays still when handled or approached is often close to lay.
- Nesting interest: birds begin to look into nest boxes, sit in them briefly or make nesting sounds.
- Feed intake: consumption rises as the bird's requirements increase for egg formation.
The first floor eggs are the final sign, and they are a sign that you have missed the earlier window. If you see eggs on the floor, the flock has probably been ready for a week, and the nest boxes need attention now.
Body weight: the number that decides a good start
Body weight at point of lay is the most important number in the whole rearing period. A pullet that reaches lay at the breeder's target weight is much more likely to start on time, lay steadily and build the egg size and shell strength that the market pays for. A pullet that is underweight may start late and lay small eggs; one that is overweight may start on time but lay fewer eggs over the cycle.
For many brown hybrids, the target weight at point of lay sits in the region of 1.4 to 1.6 kilograms, but the breeder's weight chart gives the exact figure for each week of age. Use the chart, not a rule of thumb. Weigh a random sample of 20 pullets every week from about week 10, record the average and the range, and compare the result with the chart. The brooder stage sets much of that weight, so our brooder set-up guide is worth reading first.
If the average is behind the chart, look at feed intake, feeder space, water supply and parasites before you change the ration. Underweight flocks often have a problem in one of those four areas rather than in the feed itself. If the average is ahead of the chart, check that the feed programme has not been too rich for the age, since excess weight at lay is a common cause of poor late production.
Feed changes around 16 to 18 weeks
The move from grower to pre-lay feed is the most important feed change in the rearing period. It is also the change most often made on the wrong day. Move too early and you feed calcium to birds that cannot yet use it. Move too late and the body does not have the reserves it needs for the first eggs.
Make the change on the breeder's age and weight guidance, and blend the rations over several days. A practical method is to mix the two feeds at increasing proportions, starting with a small share of the new ration and finishing with the full pre-lay feed. Keep an eye on intake during the change, and return to the previous ration if intake falls sharply.
Feed change checklist
- Confirm the flock's average weight against the breeder's chart before you start the change.
- Check the pre-lay bag for protein and calcium figures, and compare them with the grower bag.
- Blend the two rations over three to five days, and record the proportions.
- Offer oyster shell in a separate feeder once the flock is moving onto layer feed, so birds can take it as needed.
- Switch to the layer ration when about 5 per cent of the flock is laying, and keep the trough fresh each morning.
Do not give layer feed to pullets early because you want them to lay sooner. The extra calcium does not speed up lay, and it can harm young birds.
Lighting: why day length should not change suddenly
Light is a trigger for lay, and the direction of change matters. Many layer programmes increase day length steadily during rearing, so that the birds reach lay with a signal that is clear and consistent. Sudden changes, in either direction, can cause a late or irregular start, or a fall in production after the start.
In a closed house, you control the light. In an open-sided house, natural daylight varies with the season, and the house lights may need to be used to keep the programme steady. Ghana's day length near the equator changes only a little over the year, but the house still needs a fixed schedule. Choose a programme with your breeder or vet, write it down, and keep to it.
Do not switch lights on and off at random, and do not let the house become dark for long periods in the middle of the day. Both can upset the birds' rhythm and delay the start.
Nest boxes and training pullets to use them
Nest boxes should be in the house before the first egg, not after it. Introduce them around 16 weeks, so that the pullets can get used to them while the flock is still growing. A nest that is dark, clean and filled with suitable material is much more likely to be used.
Plan one nest for every four or five hens, as a common guideline. Keep the nests in a quiet part of the house, and shut the pop-holes in the evening during the first week of lay if birds are sleeping in the nests. Gently place pullets that are showing signs of lay into a nest, and check the nests at least twice a day. Eggs laid on the floor get dirty and cracked, and a flock that learns to lay on the floor is hard to retrain.
In hot weather, keep the nests cool and shaded, and make sure the air can move through them. Warm, enclosed nests can lead to eggs that deteriorate before they are collected. For the housing side of this, our poultry housing designs guide covers ventilation options.
Why some flocks start early
An early start is not always a success. A flock that begins laying before the breeder's window often has a few common issues. The pullets may have been brought on too quickly, with more feed or more light than the programme called for, so they reach lay heavier and sooner than the chart expects. Early eggs from such a flock tend to be very small, and the shells can be weak.
Early starts also tend to finish early. A flock that comes into lay too fast may reach peak sooner and fall away earlier, so the total number of eggs is not always higher. Check the weight chart, the feed programme and the light before you celebrate an early first egg.
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Why some flocks start late
A late start is more common and usually more costly. The main causes fall into a short list. Underweight birds start late, often because of poor feed intake, too few feeders or drinkers, parasites or a disease challenge in rearing. Stress is another cause: a house move, a change of feed, a new handler or a heat wave can each delay lay by a week or more. Light is a third cause. A flock that has had an irregular or shrinking day length may not come into lay on time.
| Possible cause | What to check | First action |
|---|---|---|
| Underweight birds | Average weight against the chart | Review feed intake and feeder space |
| Disease in rearing | Records of deaths and sick birds | Call your vet and review the vaccination record |
| Stress | Recent moves, feed changes or heat | Reduce handling and keep routines steady |
| Irregular light | Lighting schedule and timer | Restore a steady programme |
| Parasites | Signs of mites, lice or worms | Follow your vet's control programme |
A run-up timeline from week 14 to first egg
A simple timeline helps you prepare for the first egg without last-minute scrambling. The actions below are typical; adjust them to the breeder's guide and your vet's schedule.
| Age | Action | What to check |
|---|---|---|
| 14 weeks | Review weight chart and feed stock | Average weight is on the chart |
| 15 to 16 weeks | Introduce nest boxes to the house | Nests are clean, dark and accessible |
| 16 to 17 weeks | Begin blending pre-lay feed | Intake holds steady during the change |
| 17 to 18 weeks | Add oyster shell in a separate feeder | Birds take shell and the trough is clear |
| 18 weeks | Switch to layer feed when about 5 per cent are laying | Daily egg count started |
| 18 to 20 weeks | Watch for signs of lay and check nest use | Floor eggs are rare and nest use is rising |
Keep the timeline on the wall of the house, so that everyone who works with the flock sees the same plan and the same dates. If you are still planning the whole project, our budget guide for starting a poultry farm helps you cost the rearing period.
What to do if laying is late
If the first eggs have not arrived by the breeder's window, do not add calcium or increase the feed in a hurry. Start with a diagnosis. Weigh a sample of birds and compare the average with the chart. Check the feed records, the water supply and the number of feeders. Review the light programme and the house temperature. Then look at the birds themselves for signs of disease or parasites. Our FAQ answers common questions about rearing and early lay.
If the weights are behind and the feed is adequate, the problem is usually in the house or the flock's health. If the weights are on the chart and the flock is still late, the light programme or a stress event is the more likely cause. Involve your vet early, because a disease challenge in rearing can delay lay for weeks and look like a feed problem at first.
Be patient, but keep records. A flock that starts two weeks late and then lays steadily is a different problem from one that never settles, and your records will show which one you have.
Questions farmers ask
At what age do layers start laying?
Most layer pullets start laying between 18 and 20 weeks. Brown hybrids commonly lay their first egg around 18 to 19 weeks, and many flocks reach about half production by 20 weeks. Check the breeder's guide for the line you are raising, and use the flock average rather than one early or late bird as your measure.
What are the signs that hens are about to start laying?
Watch for reddening and enlargement of the comb and wattles, a widening of the pelvic bones, a moister vent, squatting when approached, interest in the nest boxes and a rise in feed intake. These signs usually appear a week or two before the first egg, so check several birds regularly rather than relying on one sign.
When should I switch pullets to layer feed?
Change from grower to pre-lay feed on the breeder's age and weight guidance, blending the rations over three to five days. Move to layer feed when about 5 per cent of the flock is laying. Switching early wastes money and can harm young birds, while switching late can leave the flock short of reserves for the first eggs.
Why are my first eggs small?
Small eggs in the first weeks of lay are normal, and they grow larger as the hen matures. If they stay small or the shells are weak, check the flock's weight, the calcium in the feed, the feeding times and the house temperature. A flock that started early often lays small eggs for longer, so check whether the pullets were brought on too quickly.
How can I make my flock start laying on time?
Keep the flock on the breeder's weight chart from week 10, introduce nests by about 16 weeks, change feed on schedule, and keep the light programme steady. Protect the birds from stress and disease during rearing, and follow your vet's vaccination and parasite schedule. Good records make it easy to see early when the flock is falling behind.
What should I do if my pullets are still not laying at 20 weeks?
Start by weighing a sample and comparing the average with the breeder's chart. Check feed intake, water supply, feeder space, the light programme and the house temperature. Look for signs of disease or parasites, and call your vet early if you find them. Avoid adding extra calcium or high-protein feed in a hurry, since that does not fix the underlying cause.
