It's a brand new season of America's Top Dog with new dog breeds, new courses, and new head-to-head matchups in the first round!

Small dogs take over America's Top Dog when a 17 pound Underdog takes on a protective Czech shepherd, and two K9s from the same department duke it out.

A speedy pitbull takes on a Belgian Malinois that trains K9s. A rebellious schnauzer goes up against a brainy border collie.

The competition is coming to a boil with head to head heats that put everything to the test. A female K9 aims to dominate her male opponent.

In a series of head to head matchups, an Ibizan Hound won't get tied up by the rules, a fearless K9 unleashes his inner Avenger, and a detective working dog is determined to have the last bite. It's an emotional ride all the way to the last Takedown.

A frisbee-catching pro takes on a resilient demo dog. A female K9 goes up against the tallest dog of the season. And an engaged couple compete against each other with their sibling terriers. Only one dog will be declared Top Dog and move on to the finale.

Second place left them hungry for a win, so these top notch competitors are back to battle it out for the last remaining spot in the season's grand finale.

It's a battle between the best of the best when the season's seven winning teams face off in the final showdown.