Why chicken are good runners and fliers?

Chickens are actually not very good fliers or runners, compared to other birds and animals. Let's break down why:

Flying:

* Short wings and small breast muscles: Chickens have relatively small wings and underdeveloped breast muscles compared to birds that fly long distances. This means they lack the power and strength needed for sustained flight.

* Heavy bodies: Chickens are relatively heavy for their size, which further hinders their ability to take off and stay airborne.

* Primarily ground-dwelling: Chickens evolved to be primarily ground-dwelling, foraging for food on the ground. This lifestyle means they don't need to fly long distances.

Running:

* Relatively short legs: While chickens can run quickly in short bursts, their relatively short legs limit their speed and endurance compared to other animals.

* Heavy bodies again: Their weight makes them less agile and quick on their feet, especially over longer distances.

* Not built for speed: Chickens don't have the muscle structure or bone structure designed for sustained running like a cheetah or a horse.

So, while chickens can flap their wings and run, they're not particularly efficient at either activity.

It's important to note: Some chicken breeds, such as the Game fowl, have been selectively bred for fighting and have stronger wings and more powerful legs. However, even these breeds are still limited in their flight and running capabilities.