In less than two months, Mamma Mia the beagle went from rags to royalty. Her changed life began in July when federal authorities rescued her — along with 4,000 other beagles — from overcrowded and unsanitary conditions at the Envigo breeding and research plant in Virginia. Her new home is a sprawling estate in Montecito, where the 7-year-old dog will roam around a lush 7-acre property. Her new owners? The Duke and Duchess of Sussex.