Tillie the dog was named Washingtonian of the Day by Governor Jay Inslee for watching over her dog friend Phoebe who was trapped in a cistern for nearly a week. The two had been missing for several days on Vashon Island in Washington State when Tillie eventually managed to capture the attention of a local human before quickly returning to watch over Phoebe. As a basset hound, Phoebe's poor little legs weren't long enough to get her out of the cistern. For days, Tillie never left her guard post for long, always returning after trying to alert humans to the critical situation. 

Sources: The Seattle Times