The truth of a herd of pigs

A herd of pigs were locked in the walls,           
They can't go over to see the outside truth
And can't make a free walk           

Did they go to their owner for asking Why?            
The owner said: There was real happiness in the pigsty            
You think! The owner explained:  A plenty of food and drinks 
Provided to you always with care, when you guys enjoy 
A sweet snoring  sleep inside            

Comparing to the birds flying in the sky 
The poor alien species have to make restless fly!            
Because they are Not blessed to have such a life 
As a pig might, they are the most unfortunate instead
       
You are the happiest piglets worldwide!            
You even don't need any truth, trust me! 
Such a life you've had is both happy and luxurious            
What you need is to roughly drink and eat
Then stay quietly in your pigsty for a nice sleep            

However, one thing you must remember
To Make sure everything is right and proper
And also used to listen to my order! Go! drink and eat!
I will take full responsibility for all the matters           

You see! Who can have such happiness in the world?            
Only you, you unique pigs!