Why Eagles fly and Chickens flutter

Once upon a time, long, long ago, the Eagle and Chicken were very
good friends. Everywhere they went these friends went together. It
was not uncommon for people to look up and see the Eagle and
Chicken flying side by side through the air.
One day, while flying, the Chicken said to the Eagle, "Let's drop down
and get a bite to eat. My stomach is growling."
"Sounds like a good idea to me," replied the Eagle. So the two birds
glided down to earth, saw several animals eating, and decided to join
them. They landed next to the Cow. The Cow was busy eating corn,
but noticed that the Eagle and the Chicken were soon sitting on the
ground next to her.
"Welcome," said the Cow. "Help yourself to the corn."
This took the two birds by surprise. They were not accustomed to
having other animals share their food quite so readily.
"Why are you willing to share your corn with us?" asked the Eagle.
"Oh, we have plenty to eat here. Mr. Farmer gives us all we want,"
replied the Cow.
Well, the Eagle and the Chicken jumped in and ate their fill. When
they finished, the Chicken asked more about Mr. Farmer.
"Well," said the Cow, "he grows all our food. We don't have to work
for the food at all."
"You mean," said the Chicken, "that Mr. Farmer simply gives you all
you want to eat?"
"That's right," said the Cow. "Not only that, but he gives us shelter
over our heads."
The Chicken and the Eagle were shocked! They had never heard of
such a thing. They had always had to search for their food and work
for shelter.
When it came time to leave, the Chicken and the Eagle began to
discuss the situation:
"Maybe we should just stay here," said the Chicken. "We can
have all the food we want without working. And that barn over
there sure beats those nests we have been building. Besides,
I'm getting tired of always having to work for a living."
"I don't know about all this," said the Eagle. "It sounds too
good to be true. I find it hard to believe that one can get
something for nothing. Besides, I kinda like flying high and free
through the air. And providing for food and shelter isn't so bad.
In fact, I find it quite challenging."
Well, the Chicken thought it over and decided to stay where there was
free food and shelter. But the Eagle decided that he loved his freedom
too much to give it up, and enjoyed the consistent challenge of
making his own living. So, after saying goodbye to his old friend the
Chicken, the Eagle set sail for the wild blue yonder.
Everything went fine for the Chicken. He ate all he wanted. He never
worked. He grew fat and lazy. But then one day he heard the farmer
say to his wife that he was yearning for fried chicken. Hearing that,
the Chicken decided it was time to check out and rejoin his good
friend Mr. Eagle. But when he attempted to fly he found that he had
grown too fat and lazy. Instead of being able to fly, he could only
flutter.