The uglier the dog, the more there is to love. That might make an appropriate motto for the folks behind the annual World's Ugliest Dog contest, a staple at the Sonoma-Marin fair in Petaluma, California for the past 50 years. The aim is to celebrate imperfect canines and encourage adoption of pets in need of good homes. This year’s winner was Scooter, a 7-year-old Chinese crested dog born with…