Breeding your own birds is one of the most rewarding parts of poultry keeping, but it asks for patience, planning and a willingness to learn from each hatch. This guide walks through the whole journey, from choosing parent stock to settling well-grown youngsters into the flock.

Selecting breeding stock and the basics of genetics

Good chicks come from good parents, so the decisions you make before any egg is laid matter most. Choose breeding birds that are healthy, active and a fair example of their breed, with no history of recurring illness. Vigour, temperament and laying ability are partly heritable, so breed from your best birds rather than your spare ones.

A cockerel passes traits to every chick, so he is the single most influential bird in your breeding pen. Aim for one cockerel to roughly six to ten hens for good fertility without the hens being over-mated. Avoid breeding from close relatives over several generations, as this tends to concentrate weaknesses and reduce hatch rates and vigour.

A few genetic points worth knowing:

In chickens the hen determines the sex of the chick, not the cock.
Some breeds carry colour or pattern genes that let you sex chicks at hatch (autosexing breeds) or by crossing two breeds (sex-linking).
Pure breeds come true to type; hybrids and crosses do not breed true, so their offspring will vary.
Faults such as crooked toes, wry tail or poor leg colour can be passed on, so do not breed from affected birds.

Fertile and hatching eggs

Fertility depends on a healthy, mature cockerel running with the hens for at least two to three weeks before you collect eggs to set. Birds in hard moult, in very cold spells or in poor condition will give disappointing results, so the natural breeding season of spring into early summer usually gives the strongest hatches.

Select clean, well-shaped eggs of normal size for the breed. Avoid anything cracked, misshapen, very large, very small or with a thin or porous shell. Store eggs you intend to set somewhere cool but not cold, ideally around 10 to 15 degrees, pointed end down, and turn them daily.

Set eggs within about seven days of laying for the best hatch rates; fertility falls steadily after that.
Do not wash hatching eggs, as washing removes the natural protective bloom and can let bacteria in.
Let chilled or posted eggs rest, settle and come up to room temperature before setting them.
Posted eggs often hatch less well because the air cell can be damaged in transit.

Natural incubation with a broody hen

A broody hen is the simplest route to chicks and needs no electricity. A hen goes broody when she stays on the nest, fluffs up, growls and refuses to leave. Reliable sitters include many traditional and bantam breeds, with Silkies and crosses being well known for it.

Move the broody to a quiet, predator-proof spot of her own before giving her eggs, so other hens cannot disturb her or add fresh eggs to the clutch. A hen can usually cover anywhere from a handful up to a dozen eggs depending on her size. Mark the eggs with a pencil so you can spot any extras.

Let her manage the warmth and turning herself; she does this far better than any machine. Ensure she has food and water close by, and that she leaves the nest once a day to eat, drink and pass droppings. Incubation runs about 21 days for chickens, and a settled broody will see the clutch through and then brood the chicks for you afterwards.

Incubator incubation and candling

An incubator gives you control and lets you hatch more eggs than a hen can cover, but it demands attention. Run the incubator empty for a day first to check it holds a steady temperature before you trust eggs to it. Most chicken eggs need around 37.5 degrees in a forced-air (fan) incubator, with humidity kept moderate for most of the term and raised for the final days.

Turn eggs an odd number of times a day until lockdown; automatic turners make this easier.
Stop turning about three days before hatch (lockdown), raise the humidity and leave the lid closed.
Keep the incubator out of draughts and direct sun, and away from big swings in room temperature.
Resist opening the incubator during hatching, as the drop in humidity can shrink-wrap chicks in the shell.

Candling means shining a bright light against the egg in a dark room to see what is developing inside. Candle at around day seven to ten: fertile eggs show a spider of blood vessels and a dark spot, while clear eggs (infertile) and those with a ring of blood (early death) can be removed. Removing duds reduces the risk of a rotten egg bursting and contaminating the rest.

Brooding chicks

Newly hatched chicks cannot regulate their own temperature, so they need a reliable, draught-free brooder. A heat plate (which the chicks tuck under) is safer and more natural than a bulb, though heat lamps are still widely used; whichever you choose, always give the chicks room to move away from the heat.

Start at roughly 32 to 35 degrees under the heat source in the first week, then reduce by a few degrees each week until the chicks are fully feathered at around five to six weeks. The chicks themselves are the best thermometer: spread out evenly and busy means comfortable, huddled under the heat means too cold, and panting at the edges means too hot.

Use a non-slip floor covering; smooth surfaces cause splayed legs.
Provide chick crumb and clean water in shallow drinkers a chick cannot drown in.
Keep the brooder scrupulously clean and dry to reduce the risk of disease.
Watch for pasting (droppings stuck to the vent) and gently clean it off with warm water.

Rearing, sexing and integrating youngsters

As chicks feather up they need more space, perches to practise on, and a gradual move from heat to ambient temperature. Once fully feathered and hardy, they can go to a secure outdoor run on mild days and then to permanent housing. Move them from chick crumb to grower feed at the appropriate age, and never give layer feed to growing birds, as the calcium level is too high for them.

Sexing young birds takes experience. Vent sexing is a skilled job best left to experts, but with most breeds you can tell cockerels from pullets over time by their larger combs and wattles, bolder stance, later feathering and, eventually, the first attempts at crowing. Autosexing and sex-linked crosses let you tell them apart at hatch by down colour.

Integrate youngsters carefully to avoid bullying:

Wait until they are a good size, ideally near point of lay, before mixing with adults.
Use the “look but don’t touch” method, housing them adjacent to the flock for a week or two first.
Introduce them on neutral ground or at night, and provide extra feeders, drinkers and space.
Always keep new or returning birds separate for a quarantine period to protect the existing flock’s health.

Maintaining quality bloodlines

Keeping a line strong over the years means breeding with a plan rather than letting birds pair up at random. Keep simple records of which birds produced which chicks, and select the next generation for health, type and temperament. Introducing an unrelated bird of the same breed from time to time refreshes the bloodline and guards against the weakening that comes from breeding too close.

Cull honestly: not every bird should breed, and passing on faults helps no one. If a health problem ever appears in your stock, consult a qualified vet rather than attempting to treat or diagnose it yourself, as accurate advice protects both your birds and any you might sell on.

Breeding and rearing reward steady observation more than fancy equipment. Start small, keep notes, learn from each hatch, and you will steadily raise healthier, truer birds season after season.

Breeding and Rearing