This is inaccurate to the majority of mass produced chicken. Mature chickens are stunned before being slaughtered. This can be accomplished in three major ways: electrocution, suffocation, or mechanically striking the brain. In many cases the chicken does not suffer pain or distress. What is more valid to criticize is how male chicks are killed. Due to a lack of regulation, farmers frequently toss them into a grinder while still alive and conscious.

Edit: You shouldn’t crop out the credit to the artist. Brand recognition is essential to their livelihood.