Photos by Janie Willison Raised in Denver, Colorado, actress and beloved Broadway star, Sierra Boggess, never experienced a home devoid of a pet: "I grew up with cats always and always rescues. We had four cats at one time! I don't understand the point of a house without an animal in it at all."Boggess made her Broadway debut originating the role of Ariel in Disney's The Little Mermaid in 2007. As fate had it, that y…