Recently in S5:Ep512:Britney Dawg and Boo Category

Can Cesar transform Boo's aggressive ways? Find out Friday, April 17, 9P et/pt!

NAME: Boo
BREED: Dachshund mix
AGE: 2 ½ years

ABOUT THE DOGS: Boo was found abandoned on the side of a road with his mother and one other puppy. Rose and Jerry Bizon adopted him in 2006 at the same time they had purchased their first house. They immediately noticed some behavioral issues that have since intensified.

Boo often exhibits aggression at feeding time, baring his teeth and growling when Jerry or Rose approach him and his bowl. The Bizons also have trouble when trying to trim his nails. He has lunged and bitten them several times. And if a dog gets too close to Boo, he becomes very aggressive toward them.

ABOUT THE OWNERS: Rose Bizon works part-time as an administrator at "I Dig My Dog" doggie daycare. Rose credits Boo with changing her life. It was because of him that she got the doggie day care job, adopted a second dog, Daisy, and is now working toward rescuing dogs and learning about their behavior.

Rose's husband Jerry owns a custom guitar repair shop. He has been building and repairing guitars professionally for over 18 years.

BEHIND THE SCENES: Rose and Jerry's neighbor Carla, who has always been on the receiving end of Boo's aggression, came by at the end of the day and sat on the couch next to him. She was amazed that it was the same dog and actually asked Cesar if he had switched dogs!

Meet Britney Dawg this Friday, April 17 at 9P et/pt on National Geographic Channel!

NAME: Britney Dawg
BREED: Pit Bull / Rhodesian Ridgeback-Mix
AGE: 6 years

ABOUT THE DOG: Nicole Maples rescued Britney from a shelter after the pit bull-mix was found running through a park.

Britney is very well trained. She can open an ice chest, get a drink out, and bring it to Nicole. She can also play dead, high five, high ten, crawl, and bow. But her parlor tricks don't make up for her lack of social etiquette.

Britney is aggressive toward people and other dogs. She lunges, snarls, and barks at any visitors to the Maples home. And while Britney will tolerate Nicole's boyfriend Clinton, she is confrontational with Clinton's dog Buddy Boy.

ABOUT THE OWNER: Nicole Maples is a student studying Animal Science at Cal Poly in San Luis Obispo, CA. Nicole also helps manage the Swine Unit there. Together with her partner, she oversees all functions of the facility - feeding, breeding, weaning, and processing the pigs. Nicole also works part time as dog trainer, teaching basic obedience.

BEHIND THE SCENES: During the initial shoot, the production crew had to deal with freezing rain and the cameras had to be covered with rain gear. There was only one "rain jacket" for the cameras, so the other had to be wrapped in a trash bag. One of the cameramen even fell victim to Britney's aggression!