Well before Bronx Mowgli entered the world, Pete Wentz and Ashlee Simpson asked Cesar Millan for help with prepping their two dogs, Hemingway and new pup, Rigby, for the baby's arrival. The trainer offered tips on consistency and a rather unusual way to work off the bulldogs' excess energy. Watch a sneak peek of the episode of The Dog Whisperer starring this fam (airing on Dec. 28) to learn more.