Sophie Bennett
Cornish Cross chickens are the result of a four-way crossbreed, engineered for rapid growth and double the muscle of their ancestors. They are the primary commercial meat breed globally, with over 95% of chicken grown globally being Cornish Cross. They are the product of years of crossbreeding, with breeders vying to produce the best meat bird, judged on criteria including growth rate, feed conversion efficiency, and the amount of meat on breasts and drumsticks. The two dominant sources of the Cornish Cross's genetic stock are Aviagen and Cobb-Vantress, whose stock comes from breeders who participated in the Chicken of Tomorrow contests in the 1940s and 1950s.
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What You'll Learn
A four-way cross between cocks and hens
The Cornish Cross chicken is a hybrid breed that was developed in the United States in the 1950s. It is the result of a four-way cross between cocks and hens, specifically bred to produce chicks with rapid growth and double the muscle of their ancestors. This breed was created to meet the demand for a chicken that could grow quickly and produce a lot of meat, especially breast meat.
To create a Cornish Cross chicken, you would need to start with two-way-crossed hens (AB) and two-way, differently-crossed roosters (CD). The offspring of this cross will be four-way crossed (ABCD). This process is very involved and takes years to perfect, which is why it is not commonly done by backyard breeders.
One possible combination for a four-way cross could be the following:
Start with a White Plymouth Rock hen, which is known for its muscular build and meaty frame, and cross it with a Red Cornish rooster, which has a stocky, muscular body and a broad chest. The offspring of this cross will be a two-way cross (AB). Then, take a Barred Rock hen, which has a good growth rate and excellent breast qualities, and cross it with a Dark Cornish rooster, which will contribute to the stocky build and white feathers of the offspring. The offspring of this cross will be another two-way cross (CD).
Finally, take the two-way crossed hens from the first cross (AB) and breed them with the two-way crossed roosters from the second cross (CD). The resulting offspring will be a four-way cross (ABCD), which is the Cornish Cross chicken.
It is important to note that the specific breeds and combinations used in creating the Cornish Cross chicken may vary, as breeders closely guard their secrets. Additionally, the Cornish Cross chicken has come under criticism for the health problems and deformities that the birds may suffer due to their rapid growth rate.
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A cross between Cornish hens and Plymouth Rock roosters
The Cornish Cross chicken is a hybrid breed created by crossing a Cornish chicken with a White Plymouth Rock chicken. The Plymouth Rock chicken was one of the breeds used in today’s Cornish Cross meat bird. The average dressed weight of a Cornish cross chicken is around 3-4 pounds when processed at 6-8 weeks of age.
The Cornish Cross chicken has a distinctive appearance with a stocky, muscular build, broad chest, short thick thighs, and a wide stance. Their legs tend to be yellow in color and are strong enough to support their large body weight. They have white feathers, which create a cleaner carcass as modern consumers view dark pin feathers under the skin negatively.
Cornish Cross chickens are known to be docile and easy to handle, and they are not prone to aggression. They tend to spend most of their time eating and resting, and they are not good flyers or foragers. This makes them well-suited for confinement in a coop or run.
The breed was developed in the United States in the 1950s to meet the demand for a chicken that could grow quickly and produce a lot of meat, especially breast meat. The Cornish Cross was designed as a single-purpose meat bird, and it grows much faster than other chicken breeds.
To create a Cornish Cross chicken, one could cross a Cornish hen with a Plymouth Rock rooster. The Cornish hen, also known as the Indian Game chicken, was first developed in England around 1820 by Sir Walter Gilbert, who crossed a Red Aseel with a Black Breasted Red Game of the Lord Derby type. The breed was later improved by crossing it with other game birds, including the White Plymouth Rock hen and the Malayan fighting cock, resulting in a succulent bird suitable for a single serving.
Crossing a Cornish hen with a Plymouth Rock rooster can be advantageous due to the fast growth rate, high meat-to-bone ratio, and mild flavor of the offspring. However, it is important to note that this cross may also lead to health problems due to rapid growth and difficulty in natural reproduction, as the unusually large breasts of the offspring can hinder successful natural mating.
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The result of 60 years of selection
The Cornish Cross chicken is the result of 60 years of selection and cross-breeding. It is a hybrid breed, created through a four-way cross between two cocks and two hens, with the aim of producing chicks with rapid growth and double the muscle mass. This breed has become the dominant commercial meat breed globally, with over 95% of chicken grown globally being Cornish Cross.
The history of the Cornish Cross chicken can be traced back to the 1940s and 1950s, with the "`Chicken of Tomorrow`" contests, which encouraged breeders to produce and submit their "meat bird" eggs for judging. The winning entries from these contests, the White Plymouth Rocks and the Red Cornish cross, formed the basis for the Cornish Cross breed. Over the years, the breeding programs have been refined, with a focus on enhancing breast meat development and improving feed-to-body-weight conversions, resulting in birds that can be brought to market within 6 to 8 weeks.
The Cornish Cross chicken has been selectively bred for its high-yield meat production, with a growth rate of at least a pound a week. This rapid growth has led to some health issues, including leg and heart problems, as the circulatory system struggles to keep up with the demands of the body. The sustainability of this breed has also been questioned, as all offspring are destined for processing due to their rapid growth.
Creating a four-way cross is a complex and time-consuming process, and it is challenging for small-scale or backyard breeders to achieve. It requires multiple generations of selective breeding to develop a viable strain, and further generations to stabilise the traits. The specific breeding methods and techniques used to create the Cornish Cross are closely guarded by the breeders who developed them.
The Cornish Cross chicken has faced criticism for its impact on animal welfare, with some claiming that the breed's rapid growth leads to health issues and deformities. However, others defend the breed, acknowledging its importance in the poultry industry and highlighting the improvements made in commercial conditions through producer education and contract requirements.
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Bred for rapid growth and double the muscle
The Cornish Cross chicken is a hybrid breed, created by crossing a Cornish chicken with a White Plymouth Rock chicken. The Plymouth Rock chicken was one of the breeds used in today's Cornish Cross meat bird. The breed was developed in the United States in the 1950s and within a couple of decades had taken over the chicken meat industry.
Cornish Cross chickens are the result of a four-way terminal cross, using cocks and hens that have been specifically bred to produce chicks with rapid growth and double the muscle. "Terminal" means that all the offspring are slated for processing because their circulatory system cannot keep up with the bodily needs of their rapid growth. This complex cross-breeding program takes years to bring to fruition.
The Cornish Cross was designed as a single-purpose meat bird, and it grows much faster than other chicken breeds. The Cornish Cross can reach a dressed weight of around 3 to 4 pounds in just 6 to 8 weeks. Dual-purpose heritage chickens take closer to 4 months to reach a dressed weight of 3 to 4 pounds. The Cornish Cross also has shorter leg bones and larger breasts, meaning more meat and less bone overall.
The distinctive appearance of the Cornish Cross sets it apart from other chicken breeds. They have a stocky, muscular build with a broad chest and short, thick thighs. They have a wide stance and a heavy, waddling gait. Their legs are usually yellow in colour and are strong enough to support their large body weight. They have white feathers, which create a cleaner carcass because modern consumers view dark pin feathers under the skin negatively.
The rapid growth rate of Cornish Cross chickens can lead to health problems and an inability to reproduce naturally. Some critics argue that breeding chickens to grow so large so quickly is cruel, as it can result in bad health and an inability to stand.
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The main commercial meat breed globally
The Cornish Cross chicken is the dominant commercial meat breed globally. It was developed in the United States in the 1950s and is now the most common meat chicken breed. This breed is a hybrid, the result of crossbreeding a White Cornish chicken with a White Plymouth Rock chicken.
Cornish Cross chickens have a distinctive appearance with a stocky, muscular build, broad chest, short thick thighs, and strong yellow legs. They have white feathers, which are favoured by consumers as they create a cleaner carcass. They are docile birds that are easy to handle and not prone to aggression. They are not active chickens and spend most of their time eating and resting. They are well-suited to life in a coop.
This breed was designed as a single-purpose meat bird, and it grows much faster than other chickens. A Cornish Cross can reach a dressed weight of 3-4 pounds in 6-8 weeks, with some reaching 5 pounds in 10 weeks and 6 pounds by 12 weeks. This rapid growth means they have a high feed conversion ratio and are ready for slaughter much earlier than other breeds.
The fast growth rate of Cornish Cross chickens does have some disadvantages, including a higher susceptibility to health problems and an inability to reproduce naturally. They are also very inactive, which can lead to health issues. Despite this, the Cornish Cross remains the most popular commercial meat breed due to its fast growth rate, high meat-to-bone ratio, and mild flavour.
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Frequently asked questions
A Cornish Cross chicken is a breed of chicken that has been specifically bred to produce chicks with rapid growth and double the muscle. They are the main commercial meat breed globally.
The Cornish Cross chicken was created by crossbreeding White Rock strains with Red Cornish strains.
It takes at least 5 generations to get to a viable strain of bird and then another 5 generations to find out if you succeeded.
Cornish Cross chickens grow quickly and have good-quality meat. They can be brought to market within 6 to 8 weeks.
Some people consider it cruel to breed chickens to grow so large so fast that they can't even stand, and they may have health problems such as leg and heart issues.
