Collects Lockjaw And The Pet Avengers #1-4 And The Tails Of The Pet Avengers. 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 onboard the adventures of Lockjaw, Lockheed, Redwing, Hairball and an all-new Frog Thor!