It takes a hen about 21 days to hatch an egg into a chick.

The fertilized egg is formed when the egg is inside the hen, at which point cell division begins. After the egg leaves the hen's body, the outside temperature drops, and the fertilized egg stops dividing and developing, and it will be dormant.

After that, the hen continues to divide the fertilized egg through her own body temperature, gradually developing it into an embryo, and after 21 days or so, the chick comes out of its shell and hatches. Temperature is an important factor during incubation, and high or low temperatures can affect hatching.

Usually, hens can hold their nests 3 to 4 times a year, and the ability to hold their nests is stronger in ground hens than in caged chickens. It usually takes at least 20 days for a hen to hold a nest, and as long as 40 days or more, and during that time the hen's appetite decreases, and the amount of eggs produced decreases.

Therefore, hens need to be moved to a well-ventilated place to grow during the nesting period, and they need to be soaked in cold water and given a sand mat in their nests.

Selection of good hens

1, select healthy, pretty laying hens that do not weigh more than 4 pounds. Because the hen is beautiful, its next generation is beautiful, only sellable; weight more than 5 pounds of hen, because in the next hold for food and then jumped into the chicken nest, it is easy to step on the chicken nest over, the so-called "chicken eggs" this adjective I do not know whether it is not so to come.

2, select a laying period at least can lay more than 16 to 20 hens, because laying fewer hens to keep the seed is not cost-effective, but also not conducive to the selection of the next generation.

3, select the hen, to select the chicken claw hairless, because the chicken claw hair, in the chick out of the shell, the chicken claw hair is easy to entangle the chick. The hen with no hair on her paws has a natural instinct to protect her young.

4, the hen's feathers should be wide, the feathers of a wide hen can ensure that the eggs are not rolled outside the hen's body and frozen, so this hen hatch rate is higher.