Bird
This guy gets a parrot but it's got a bad attitude and foul vocabulary. 
He tries everything to change the bird's attitude and clean up its talk but nothing works. 
Finally, in a moment of desperation, he puts the parrot in the freezer. 
For a few moments he hears the bird squawking, kicking and screaming and then, suddenly, all is quiet. 
He opens the freezer door. 
The parrot steps out and says, "I'm sorry that I offended you with my language and actions. I ask for your forgiveness." 
The guy's astounded at the bird's change in attitude and was about to ask what changed him when the parrot continued, "By the way, may I ask - what did the chicken do?"