Cesar Millan takes his lessons across the globe

Cesar Millan is on a mission way bigger than what he has embraced before.

"The Dog Whisperer' to me is a show that had a passion and it helped me save relationships," Millan said. "But that dog already has a house and has a family and everything is beautiful. But then you go outside of America and you realize that [unlike in ] America where 4 to 5 million dogs die every year, around the world 600 million die. So it's a global problem."

The dog behaviorist recently launched "Cesar Millan's Leader of The Pack" series on National Geographic Wild in which he travels the world trying to assist "unadoptable" dogs.

Millan works with the animals at his new Dog Psychology Center just outside of Madrid, Spain and each week potential owners from U.K., Italy and the Netherlands vie for the opportunity to offer the pets a forever home.

"The pack is very important for a dog," he told CNN. "Once you give him the right pack and the right energy, you look at him."

Millan, who also just released the book Cesar Millan's Short Guide to a Happy Dog: 98 Essential Tips and Techniques, said owners need to realize how important they are as pack leaders.

"The dog is a reflection of your energy, of your behavior," Millan said. "You have to ask, 'What am I doing?' That's the right question to ask."

But what about the ever growing issue of owners treating dogs like "furry babies?" Millan said dogs are happy being dogs and people change the identity of dogs by trying to humanize them. It's a "psychological fulfillment" for people to be invested in their pets -- as was the case with Oprah Winfrey who Millan has helped. "She doesn't have kids so her dogs became her kids," Millan said.

Rather than have dogs acting like humans, Millan joked, it would be better if we adopt some of their ways.

"I wish my kid would act like my dog sometimes," he said laughing. "My dog listens to me and does what I tell him to do."

Millan's show airs on Saturday nights at 10 p.m. EST