How And Why Do Leghorn Hens Lay More Eggs Than A Countryside Hen?

A leghorn hen is able to lay more eggs because it is larger than a countryside hen. The ability of a hen to produce eggs annually is more than ten times the weight of the body of the bird. Hence, if a leghorn hen can produce about 265 eggs per year, it weighs at least 2.65 kilograms. The more exotic the breed of poultry, the lower its production of eggs will be. Therefore, there is an inverse relationship between the breed of the bird and its production of eggs.

Countryside and backyard hens are smaller in size that leghorn hens and they are only exception to the hypothetical assumption that the more exotic the breed of poultry, the lower its production of eggs will be. This is because it is fairly common to find hens in the countryside and in the backyards of houses, and they are neither of exotic breeds nor do they have the capacity to produce more eggs than leghorn hens.

Apart from the low weight of the countryside hens, the other factors which affect the production of eggs (which are known as external and internal stimuli) are changes in the hormone levels which affect the condition of the ovaries and the oviducts, the decreasing the length of the day, the process of molting, the health of the flock, the age of the bird, a poor nutritional value and stress.

The leghorn hen, resembles the cockrel, they can be white, brown or black, and have become popular as prolific layers.
Their origin is a litle uncertain and contentious.
Generally thought to have come from Leghorn in Italy(Livorno), from which they get their name, they have become dispersed all over the world, and are also known as Danish.
They were thought to have been introduced to America from Italian Ships.
Their qualities as layers and non sitters, have made them populular everywhere.
The other qualities contributing to the popularity of Leghorns are, that they are light feeders, forage a lot, and also mature early, all things that make them suitable to producers of eggs.
They are generally not thought of as cooking birds, however in Italy they are prized, and are cooked for a long time to make them tender, and are quite delicious if prepared in this way.

1 or 1 every 2 -3 days depending on the breed

Most if not all chickens lay only one egg per day.  You will find an occasional chicken laying 2 eggs in a day but that is very rare. Most generally when chickens get old they will lay larger eggs, and sometimes they will have double yolks.

One if you are lucky

One

I think that they only lay one, but I don't really own chickens, I'm just looking into it.

As far as I know chickens will lay one egg per day. Sometimes they may skip a day or two, but mine lay once a day. I never know if I'm going to get a dozen eggs a day or eighteen eggs a day. It just depends on the chickens and if they have good quality laying mash. That helps too.