Season 4

Cesar helps Alyssa write the perfect story for her cute but aggressive Shih Tzu/Pomeranian, and helps Karol make her Chihuahua mix John Henry safe for the workplace.

Owners of energetic lab mix named Tic Tac wish to live on a boat in a local marina, but there's only one problem: Tic Tac's unruly behavior.

Cesar works with Target, a terrier/Chihuahua mix that lashes out due to tense behavior. He then tries to help Murphy, a rambunctious Golden Doodle with a dangerous habit of eating socks.

Cesar is confronted with a one-eyed rescue mutt, Duk Duk, who is so distrustful of humans, that he attacks out of fear. He has bitten his owner, her mother and her father. He now needs surgery on his leg, but the owner can't get him into the car. Cesar has his hands full and is even willing take a painful bite to teach Duk Duk to stop attacking humans and get the leg surgery he desperately needs.

Cesar is asked to help a dog named Yoshi, who is so aggressive towards other dogs that his owners have kept him locked up for a year - can Cesar help Yoshi to function outside his apartment?

In this episode, Cesar comes to the rescue of a three year-old rescue mutt, Elffie, who has bitten everyone in his family.

Cesar receives a call from two women who are concerned that their friend can’t control her adopted Golden Retriever-Chow mix Leon.

Leslie has a golden lab named Buddy that is terrorizing her grandson, Mason. Cesar helps Mason get over his fear and shows him all the behaviors that are creating anxiety in Buddy. Meanwhile, Andrea and Erica, who are fed up with their roommate Sarah’s dog Mose, decide that it is time to calm him down and show him that Sarah is the leader of the pack.

Jolene’s German Shepherd mix Rocky is extremely aggressive toward her mother, so Cesar takes Rocky to the Dog Psychology Center for intensive behavioral training. Meanwhile, Sandra is concerned that her daughter Rocio and her husband are having trouble handling their Viszla puppy named Whiskey, since they also have two young children. Cesar shows the family how to properly train Whiskey and subdue his excitement.

Cesar’s first call comes from Jason, who is struggling to spend time with his twin brother, Danny, because his German Shepard, Rusty is driving them apart. Then he helps Ivan, who lives with his girlfriend Amber and her sister Ashley and a pack of three Chihuahua’s who are disrupting the house and creating anxiety for Ivan. Cesar helps the three dog owners first conquer their incessant barking problem whenever someone comes to the door by creating boundaries.

Cesar comes to the aid of a Grandmother and Grandaughter, whose dog Izzy is a terror in their peaceful home, and Marianne, whose dog Bear is an outcast in ‘Dogtown U.S.A.’