Emily Carter
The time it takes for a chicken to grow depends on several factors, including breed and diet. Some chicken breeds mature faster than others, with faster-maturing breeds reaching full size in 7-8 months, while slower-maturing breeds like Jersey Giants and Brahmas can take up to 2 years. During the first few weeks of a chicken's life, proper care and nutrition are vital for healthy growth. Baby chicks are highly dependent on their mother or a brooder for warmth, food, and water. By weeks 4 and 5, chickens begin to show signs of adolescence, with adult feathers growing in and the pecking order starting to form. At this stage, you can also start to distinguish between males and females. From weeks 5 to 6, chicks go through visible growth changes, including new primary feathers. By week 6, the chicken coop should be ready for the birds to move into it. Around weeks 16 to 18, chickens typically lay their first egg, and their diet should be transitioned to a layer feed with added calcium for egg production.
| Characteristics | Values |
|---|---|
| Time to lay the first egg | 16-24 weeks |
| Transition to layer feed | 18 weeks or when the first egg arrives |
| Fully feathered | 5-7 weeks |
| Gender distinguishable | 4-7 weeks |
| Beginning of adolescence | 4-5 weeks |
| Time to move into the coop | 6 weeks |
| Time to slaughter broiler chickens | 6-10 weeks |
| Time for larger roasting birds | 12-20 weeks |
| Time for Jersey Giants to grow | 20+ weeks |
| Time for Brahmas to grow | Nearly 2 years |
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What You'll Learn
The first five weeks
During these early weeks, chicks are highly dependent on their mother or a brooder for warmth, food, and water. Proper care and nutrition are vital for healthy growth. It is recommended to provide a complete starter-grower feed with at least 18% protein to support chick development. The feed should also include amino acids, prebiotics and probiotics, vitamins, and minerals to support the chick's overall health and bone strength.
By the end of the fifth week, the chicks will have noticeably larger wattles and combs, which are deeper red in males than in females. The gender of the chicks can be distinguished by their physical characteristics and behaviour, with males typically being larger and attempting to crow.
Some sources suggest that by the fifth or sixth week, the chicks are usually fully feathered and can be transitioned to outdoor life. However, it is important to ensure they are fully feathered before exposing them to the outdoors.
The growth rate and maturation timing can vary depending on the breed of chicken. For example, faster-maturing breeds may reach their full size at 7-8 months, while slower-maturing breeds like Jersey Giants and Brahmas can take nearly 2 years.
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The 'tween' stage
The growth rate of a chicken depends on its breed. While some chicken breeds mature faster than others, all chickens go through a 'tween' stage, which is marked by several changes. During this stage, the chicks' fluffy appearance slowly disappears, and their fuzzy down is replaced with feathers of a mature bird. At this stage, the chicks are about four to six weeks old.
During the 'tween' stage, the chicks are still dependent on their mother or a brooder for warmth, food, and water. Proper care and nutrition are vital for healthy growth. It is important to continue feeding the chicks the same starter-grower feed that they were started on, as it provides the essential nutrients they need.
At around five to seven weeks old, you will be able to distinguish males from females. The combs and wattles of male chicks often develop earlier and are usually larger than those of female chicks. If you are still uncertain of the gender, you will know which ones are male when you hear them attempting to crow.
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The pullet stage
Pullets require a complete starter-grower feed with at least 18% protein to support their growth. This feed should also include amino acids for chick development, prebiotics and probiotics for immune health, and vitamins and minerals to support bone health. It is important that their diet does not contain too much calcium, as this can negatively impact their growth. From 5 to 16 weeks, feeding techniques are designed to avoid the build-up of fine particles in the feeders and to encourage crop development through rapid feed intake.
During the pullet stage, stronger social behaviours emerge as they establish their place in the flock. By 12 weeks, the skeleton of the pullet is almost completely developed, and they are practically fully grown in terms of size. From week 7 to week 15, the growth rate starts to slow down, and the final stage before adulthood is characterised by ovary development and rapid growth of the reproductive tract.
At 18 weeks, pullets attain sexual maturity, and the first egg usually arrives between 18 and 24 weeks. This first egg is typically small and has a weak shell, but over time, the eggs will become larger and the shells harder. Once the first egg has been laid, it is business as usual for a while. The pullet stage is complete when the chicken reaches adulthood, which can be anywhere from 7-8 months for faster-maturing breeds to nearly 2 years for slower-maturing breeds like Jersey Giants and Brahmas.
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The egg-laying stage
On average, most chicken breeds will start laying eggs around six months old, or about 20 to 24 weeks. However, some breeds that are specifically bred for egg production may start laying as early as 16 to 18 weeks of age. These early-laying breeds may include sexlinks, White Leghorn hybrids, Plymouth Barred Rocks, Rhode Island Reds, Blue Andalusians, and Ameraucanas/Easter Eggers. It's important to note that while these breeds start laying earlier, their laying lifespan may not be as long as other breeds.
Heritage breeds of chickens, on the other hand, take longer to mature and may not start laying until closer to 28 weeks of age. Some larger heritage breeds may even take up to eight months to reach production maturity. However, due to their pure genetics and slower maturation, heritage breeds often have a longer productive lifespan and are less prone to production-related mortality.
Regardless of breed, one of the key factors influencing egg-laying is the amount of daylight a hen receives. Typically, hens require at least 12 to 14 hours of daylight to trigger and maintain egg production. Therefore, it is common for egg production to decrease during the winter months when daylight hours are shorter. Supplemental lighting can be added to provide a consistent 16 hours of light per day and encourage year-round egg-laying.
Once a hen starts laying, she will need additional nutritional support. It is recommended to switch to a complete layer feed at 18 to 20 weeks of age, providing essential nutrients like protein and calcium. Calcium is particularly crucial for strong eggshells, and a steady supply is necessary as eggshells take roughly 20 hours to form. Oyster shell supplements are an excellent source of calcium, providing a slow and steady release of this vital nutrient.
In their first year of laying, high-producing and well-fed hens can lay up to 250 eggs. After the first year, egg counts will naturally decrease, with the second year yielding about 80% of the first year's production. This decline continues into the third and fourth years, with hens entering egg retirement around years six or seven. However, it's worth noting that hens can live several years beyond their retirement, with an average life expectancy of 8 to 10 years.
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The molting stage
Molting, or moulting, is a natural process that chickens go through, where they shed old feathers and grow new ones. It is a predictable process that begins at the head and neck, proceeding down the back, breast, wings, and finally the tail. The molting cycle consists of several stages, each marked by distinct changes in a chicken's appearance and behaviour.
The first stage of molting is the "catastrophic molt", where chickens lose a significant number of feathers quickly, resulting in a patchy appearance. This stage can be quite alarming for chicken owners, but it is perfectly normal. Following this initial feather loss, chickens enter the regrowth phase, where new feathers, known as pin feathers, emerge. Pin feathers are very sensitive as they contain a rich blood supply, so chickens should not be handled during this phase, to avoid injury or bleeding.
The first molt usually occurs in the fall when the days become shorter, and chickens will take a break from laying eggs. This is an annual occurrence, and chickens typically molt once a year, usually in late summer or early autumn. The timing can vary depending on the climate and breed of chicken. The first annual molt generally occurs around 16-18 months of age, although some sources suggest that chickens may molt for the first time as early as 12 months of age.
To support chickens during the molting process, it is important to provide a stress-free environment, regular health checks, and a balanced diet with additional protein. High-protein chicken feed is essential to support feather regrowth and overall health.
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Frequently asked questions
The growth rate of a chicken depends on its breed. Some breeds mature faster than others. Faster-maturing breeds reach full size in 7-8 months, while slower-maturing breeds like Jersey Giants and Brahmas can take up to 2 years.
Pullets will typically start laying eggs when they are around 6 months old. However, some pullets may start laying eggs as early as 20-24 weeks, but these first eggs tend to be small and have weak shells.
During the first week, chicks are covered in downy feathers and require a heat source. In weeks 2-3, their feathers develop more, and they become more active and social. By weeks 5 and 6, chicks will go through visible growth changes, including developing new primary feathers.
