What happens to male chicks?

The life of a male chick in the commercial egg industry is tragically short and often brutal. Unlike their female counterparts, who are destined to become laying hens, male chicks serve no economic purpose in conventional egg production. They cannot lay eggs, and the breeds used for egg-laying are not efficient for meat production (unlike broiler chickens). This fundamental economic reality leads to the systematic killing of billions of male chicks worldwide each year, a practice known as chick culling. This page explores the methods used, the ethical concerns, and the emerging solutions aimed at ending this controversial practice.

The short answer

Male chicks are killed in the egg industry because they do not lay eggs and are not efficient for meat production. They are culled shortly after hatching, typically within their first day of life. This practice is a direct consequence of the highly specialised nature of modern poultry farming, which segregates chicken breeds into those used for egg production and those used for meat (broilers).

The evidence

The global egg industry relies on highly productive laying hens, which are selectively bred for their ability to lay a large number of eggs. These breeds, however, grow slowly and produce lean meat, making them economically unviable for the meat industry. Conversely, broiler chickens are bred for rapid growth and efficient meat production, but do not lay eggs at a commercial rate. Consequently, male chicks born from laying hen strains are considered by-products.

Methods of culling vary but are designed to be immediate. The two most common methods are:

• Maceration (Grinding): Chicks are dropped into a high-speed grinder that instantly kills them. This method is considered humane by some regulations, such as those in the EU, if performed correctly, as it results in instantaneous death.
• Gassing (Carbon Dioxide Asphyxiation): Chicks are exposed to carbon dioxide gas, which causes unconsciousness and then death. This method is also widely used and is regulated by animal welfare guidelines in many countries.

Other less common or historical methods include cervical dislocation and electrocution, though these are less prevalent in large-scale operations due to efficiency and welfare concerns. The scale of this practice is immense. Estimates suggest that globally, approximately 6-7 billion male chicks are culled annually.

This practice raises significant ethical questions regarding animal welfare and the moral implications of industrial food production. Many animal welfare organisations and a growing number of consumers find the routine culling of healthy, sentient beings unacceptable.

Common counter-arguments

Proponents of chick culling often argue that it is an unavoidable necessity for the economic viability of the egg industry. The cost of raising male chicks for meat is higher than raising dedicated broiler breeds, making it economically unsustainable to keep them alive. Furthermore, there is no large-scale market for male chicks from laying hen breeds, as their meat quality and growth rate are inferior to broiler chickens.

However, technological advancements are challenging these long-held assumptions. The development of in-ovo sexing technology offers a potential solution. This technology allows for the determination of a chick's sex before it hatches, typically within the first few days of incubation. Male eggs can then be diverted for other uses, such as feed or vaccine production, or simply not incubated further, thus preventing the hatching and subsequent culling of live male chicks. This approach is gaining traction, with several companies and research institutions investing in its development and deployment.

What this means in practice

For consumers, understanding the fate of male chicks highlights a hidden ethical dimension of egg consumption. If animal welfare is a concern, purchasing eggs from producers who use in-ovo sexing technology or choosing plant-based egg alternatives are direct ways to avoid supporting this practice. Several companies in Europe and the United States are now marketing eggs as "cull-free" or "no male chick culling" thanks to these innovations.

Governments are also beginning to legislate against chick culling. Germany, for instance, became the first country to ban the culling of male chicks from January 1, 2022. France followed suit, with a ban effective from January 1, 2023. These legislative changes are primarily driven by public pressure and the availability of viable technological alternatives like in-ovo sexing. The shift signals a broader trend towards improving animal welfare standards within the food industry and responding to consumer demand for more ethical production methods.

Choosing vegan egg substitutes or eggs from verified sources that utilise in-ovo sexing is the most direct way for consumers to align their purchasing habits with concerns about chick culling. This also encourages the wider adoption of these more humane technologies across the industry.