Family Guy: 10 Worst Things Peter Griffin Has Done

Peter Griffin's ineptitude makes him the last person that should be given any kind of responsibility. His lack of intelligence often leaves behind it a wake of destruction with his friends and family suffering as collateral damage.

In the season seven episode "420", Quagmire adopts a stray cat named "Mittens". Peter and the gang are annoyed that Quagmire is spending more time with his new pet than with his friends. The gang then plan to shave Quagmire's cat as a prank while he is on a trip to Vermont.

Shaving's someone's beloved pet for a prank is mean spirited enough, however, Peter takes the prank a step further and kills the cat - albeit accidentally. Instead of admitting his mistake, Peter continues to slash away at the cat until Joe finally tells him to stop.

Whether he means to or not, Peter's stupidity has always resulted in disaster. Unfortunately, in this instance, his stupidity resulted in tragedy.