And there came a day, a day unlike any other, when Earth's mightiest heroes were unaware of a threat greater than all of them could handle. And on that day, a teleporting puppy scoured the world to assemble a team of animals to fight the foes no single beast could withstand! Strap on your collar and hop on-board the adventures of LOCKJAW, LOCKHEED, REDWING, HAIRBALL, and an all-new FROG THOR! Collects Lockjaw and the Pet Avengers #1-4.