Following Betty White’s death Friday at age 99, animals rights groups honored her lifelong work as an activist for all creatures. “Betty White was a constant and compassionate advocate for vulnerable animals across the country, and will be greatly missed,” said the ASPCA. “We send our condolences to her friends and family.” While most people knew her as America’s Sweetheart, zoos and foundations across the country knew White for the generous donations she made in the name of animal welfare. “We lost a conservationist, animal advocate, and friend,” the Audubon Nature Institute said. “When the p...