
Determining the sex of an adult chicken is a tricky business. While there are some indicators, such as behavioural differences, physical attributes, and the ability to lay eggs, these are not always reliable. Behavioural differences can be observed in chicks, with males acting less skittish and more likely to bully their peers, while females are more easily frightened by loud noises. Physical attributes such as thicker legs, higher stance, larger combs and wattles, and arched tails are more common in males, but these can vary by breed. Finally, if a chicken lays an egg, it is clearly a female, but this method is not foolproof as not all female chickens lay eggs.
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What You'll Learn
- Observe comb and wattle development: Males' grow larger and turn red earlier
- Check for aggressive behaviour: Males are more likely to be aggressive and protective of hens
- Inspect their legs: Males have thicker legs and a higher stance
- Listen for crowing: Males will start making crowing noises
- Look at their feathers: Males have uniform wing feathers, while females have varying sizes

Observe comb and wattle development: Males' grow larger and turn red earlier
One of the ways to determine the sex of a chicken is by observing the development of its comb and wattle. Both male and female chickens have combs and wattles, but the size and colour can vary between the sexes. Typically, the combs and wattles of male chickens, or roosters, will grow larger and turn red earlier than those of female chickens, or hens. This can be noticeable from around six to eight weeks of age.
Males will usually develop larger combs and wattles, which will also become bright red sooner than those of females. A bright red comb and wattle is a sign of sexual maturity and good health in both sexes, but males tend to reach this stage earlier. Hens' combs and wattles usually grow in later, when they are closer to laying eggs, which can be around 18 to 20 weeks of age at the earliest.
It's worth noting that comb and wattle size can vary depending on the breed and type of comb, so this method may be more reliable for certain breeds. For example, Ameraucanas and "Easter Egger" chickens, both male and female, tend to have very small pea combs, which may make it more challenging to distinguish between the sexes using this method.
Additionally, some hens may have impressively large combs, even bigger than those of roosters. Therefore, while observing comb and wattle development can be a helpful indicator, it may not always be a definitive method for determining the sex of an adult chicken. Combining this method with other indicators, such as behavioural differences or physical characteristics, can increase the accuracy of sexing chickens.
In summary, observing the development of the comb and wattle can be a useful tool for determining the sex of an adult chicken. Males typically exhibit larger and earlier reddening of these features, but it is important to consider breed variations and the potential for exceptions to this rule. Combining multiple sexing methods can help improve accuracy when determining the sex of an adult chicken.
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Check for aggressive behaviour: Males are more likely to be aggressive and protective of hens
Behavioural differences can be a good indicator of the sex of a chicken. Male chicks will act less skittish and are more likely to display dominant tendencies and bully their peers. They are also more likely to issue warning chirps when approached, whereas females will usually stay silent.
As chickens mature, males will often become aggressive and protective of hens. They may start crowing loudly and fighting with other roosters. They will also develop hackle or saddle feathers, and some breeds will develop an arched or longer tail. Roosters will also have larger, redder combs and wattles, which will develop earlier than those of hens.
It's important to note that some of these characteristics can vary by breed, and it can be difficult to accurately determine the sex of a chicken, especially when they're young. However, by observing a combination of physical and behavioural traits, you can make a more informed guess.
If you're unsure, it's best to consult a trained professional to perform vent sexing, which involves checking the reproductive organs of the chicken. This method can be accurate, but it can take years of practice to perfect the technique, and there is a risk of harming the bird if it's not done correctly.
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Inspect their legs: Males have thicker legs and a higher stance
When trying to determine the sex of an adult chicken, one of the key things to look out for is the appearance of their legs. Male chickens, or roosters, tend to have thicker legs and feet than female chickens, or hens. This size difference usually starts to develop early, with male chicks having chunkier legs from around six weeks of age.
Another indicator is stance. Roosters tend to stand taller than hens, with a higher stance. They may also puff out their chests, appearing larger and more impressive. This behaviour can start early, with male chicks practising from a young age.
While these indicators can be useful, it's important to note that there may be exceptions to these rules. Some female chickens may have thicker legs, while some male chickens may have thinner legs. Additionally, the accuracy of these methods can vary depending on the breed of chicken. For example, some breeds are considered autosexing, where it is easy to distinguish between males and females due to physical features or markings. In contrast, other breeds may have more subtle differences that are more challenging to identify.
One test that has been suggested is to pick up a chick and let its legs dangle. It is said that a female chick will thrash around and try to escape, while a male chick will extend its legs toward the ground. However, this method has been criticised as unreliable and potentially stressful for the chick.
Therefore, while inspecting the legs and stance of a chicken can provide some clues about its sex, it may not always be definitive. Combining these observations with other indicators, such as behavioural differences, comb and wattle size, and feather development, can help increase the accuracy of sex determination in adult chickens.
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Listen for crowing: Males will start making crowing noises
One of the most obvious ways to determine the sex of an adult chicken is to listen for crowing. If your chicken starts to crow, it is almost certainly a male. This is because only male roosters crow, and they usually start to do so when they are sexually mature. Young roosters develop at different rates, so they may begin crowing as early as a couple of months old, or they may not start until almost a year has passed. On average, cockerels will begin to crow at four or five months old. This is also around the time that male chickens start to develop saddle feathers, grow their combs, and exhibit more male behaviours.
Male chicks will also make little crowing noises, so this can be a way to determine the sex of a chicken before it is fully mature. However, it is not always easy to tell the difference between a male and female chicken when they are young. One way to do this is to examine the size of their wing feathers. Male chicks tend to have uniform wing feathers, whereas females have wing feathers of varying sizes. Another way is to pay attention to their behaviour. Males tend to be less skittish and are more likely to bully their peers. They will also make warning chirps in response to loud noises, whereas females will usually stay silent.
If you are still unsure of the sex of your chicken, you can have it vent sexed by a professional. This involves checking the chicken's reproductive organs by holding it upside down and squeezing it so that it releases any fecal matter. Then, light pressure is applied around the cloaca so that the vent area turns outward. A trained chicken sexer will be able to identify a slight bump that indicates the chick is male. However, this method can be difficult to perfect and may harm the bird, so it is generally only used as a last resort.
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Look at their feathers: Males have uniform wing feathers, while females have varying sizes
When it comes to determining the sex of a chicken, it can be a challenging task and often requires a multitude of indicators to point you in the right direction. One of the methods that can be employed is examining the feathers, specifically the wing feathers. Young male chicks tend to have uniform wing feathers, while females exhibit wing feathers of varying sizes. This method, known as feather sexing, is one of the best approaches to discern the gender of a chicken, although it is not always 100% accurate and can depend on the breed.
To implement feather sexing accurately, it is essential to examine the wings gently. The wing feathers of female chicks will appear longer and vary in size, whereas male chicks will have feathers that are approximately the same length. This disparity in feather length between the sexes is a notable indicator. However, it is worth noting that feather growth rate can vary from chick to chick and from breed to breed, so it should not be the sole determining factor. Combining this method with other indicators can increase the accuracy of your determination.
The process of feather sexing is relatively straightforward and comfortable compared to other methods such as vent sexing, which involves inspecting the reproductive organs. By carefully observing the length and uniformity of the wing feathers, you can make an educated guess about the sex of the chicken. However, it is important to remember that even with feather sexing, there can be exceptions, and some breeds may not follow this pattern consistently.
In addition to feather sexing, there are other methods to help determine the sex of an adult chicken. One clear indicator is egg-laying; if a chicken lays an egg, it is undoubtedly a mature hen (female). Roosters (males), on the other hand, will start crowing loudly around the same timeframe. Additionally, as chickens age, they may exhibit behavioural differences. Male chicks tend to be less skittish and more dominant, while females are more easily frightened and tend to run in response to loud noises.
While determining the sex of an adult chicken can be challenging, combining multiple indicators such as feather sexing, egg-laying, and behavioural observations can increase the accuracy of your determination. It is always recommended to consult a professional chicken sexer if you are unsure, as they can provide additional expertise and techniques to help identify the sex of your chickens confidently.
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Frequently asked questions
If your chicken lays an egg, it is a female. A male chicken cannot lay an egg but may start crowing loudly.
Males will generally have thicker legs than females. Males will also have a higher stance and can be more aggressive and protective towards females. Males will develop hackle or saddle feathers, and some breeds will have larger, longer, and arched tails. Males will also have larger, redder combs and wattles.
Males will act less skittish and are more likely to bully their peers. Females are more easily frightened by loud noises and will run in response. Males will also issue warning chirps when approached, while females will usually stay silent.
Professionals usually determine the sex of chicks by examining their cloaca (vent opening and sex parts) just after hatching. This method is known as vent sexing and involves carefully holding a chick upside down and squeezing it so that it empties its body of fecal matter. Light pressure is then applied around the chick's cloaca so that the vent area turns outward. A trained professional will be able to identify a slight bump that signifies that the chick is male.











































