Calling all dog lovers!  Nat Geo WILD is gearing up for BarkFest–a weekend of all bark, no bite TV featuring some of the smartest, most unique and cutest canines in the world. There will be surfing dogs, service dogs, games to find out if your dog is a genius, Cesar Millan marathons and much more.

BarkFest kicks off with World’s Greatest Dogs on Friday, May 15, at 8 p.m. ET/PT. These are the stories of extraordinary dogs: a surfing therapy dog, a bionic dog, a dog with the world record in scootering and many more. 

The dog-loving fun continues with the world premiere of the three-part series Is Your Dog a Genius?, Friday, May 15, at 10 p.m. ET/PT, continuing Saturday and Sunday at 10 p.m. ET/PT. Duke University dog scientist Dr. Brian Hare uses his groundbreaking research to help dog owners better understand their canine companions. He introduces at-home games that reveal your dog’s personality and introduces viewers to extraordinary dogs with remarkable problem-solving abilities.

Additional BarkFest premieres include Unlikely Animal Friends: Barktacular!, featuring uncanny canine pals like cheetahs, rats and goats; and Super Underdogs, highlighting the stories of dogs at their most extreme — physically. These dogs were born with unusual characteristics and they’re pushing boundaries, taking their owners along for a fun ride. BarkFest also features the season two finale of Cesar 911, The Incredible Dr. Pol: Deja Moo!: Dog-a-POL-ooza and episodes of My Dog Ate What?

Rounding out the weekend is a Cesar Millan marathon on Saturday, May 16, from 7 a.m. to 5 p.m. ET/PT, Wonder of Dogs, And Man Created Dog, Science of Dogs and The Secret Life of Dogs.

Tune in for 48 hours of all dogs, all the time.