Crystal and Moose, the two German shepherd guard dogs who were fired from their jobs at the Cultural Heritage Foundation because they were too nice to chase intruders, found new jobs over the weekend--as pets. Unlike their other line of work, the dogs got the hang of their new job quickly, said new owner Nancy Hansen of Van Nuys, a script supervisor. They frolicked in their new yard, barked at the neighbors' dogs, wolfed down dinner, and spent a night snoozing on the patio. "They're just darling," said Hansen, who adopted the dogs after reading about their plight in The Times. The dogs, who were strays, were employed for six years to guard the eight Victorian homes being restored at Heritage Square. But they were too friendly, and with work stepping up, the foundation replaced them with a guard service.