The article states that 4 to 6 billion male chicks are killed a year. When looking to raise hens to lay eggs. This company has developed a system for identify

The article states that 4 to 6 billion male chicks are killed a year. When looking to raise hens to lay eggs. This company has developed a system for identifying the sex of a chicken whilst it is an egg. So that they don't need to hatch it to determine if it's a male chicken and then kill it.