The Barnyard Games / War of the Pranks

S1 E6: The animals stage a Barnyard Olympics, with Otis letting Abby the cow compete out of the kindness of his heart.  She whips him in event after event.  He can't believe a girl is beating him and tries to ascertain her weaknesses to take advantage of the one thing he has over her in spades - his sneakiness and deceit! When Bessy sees through Otis's fake crop circle prank, he vows to prank her but good!  Annoyed by his childish behavior, Bessy decides to teach him a lesson by pranking him into thinking that aliens have kidnapped her with the intention of sucking out her brains.