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Once living on the street, a three-legged pit bull now shows aggression with her new owner's friends. Can intense training give her a second chance?

Adopted as a puppy, an excitable shepherd-husky mix longs for pack leadership and engagement — which raises deep-seated issues for an Oakland couple.

Even the sharpest protection dog can use regular refresher training. Jas visits boxer Andre Berto and his family to work with their beloved canine.

This angelic-looking yet devilishly unpredictable Maltipoo means everything to a young boy. Jas teaches him to take the lead with the pampered pooch.

A couple who've both lost loved ones look to Jas for help in taking control of their rebellious pit bull puppy and turning his dominant energy around.

Jas extends a hand to a big, beleaguered rescue in the Mojave Desert and introduces a rehabbed hound to NFL player Marshawn Lynch and his goddaughter.