Katherine Schwarzenegger is balancing it all when it comes to being a first-time mother to her daughter, 8-month-old Lyla, and continuing to prioritize her beloved dog, Maverick.ET's Kevin Frazier recently spoke to 31-year-old Schwarzenegger about her partnership with Canidae Premium Pet Food for their Sustain the Goodness campaign as well as the launch of their new Sustain line that she feeds Maverick with, and she talked about how Maverick has adjusted to baby Lyla.