They're being forced to live on crumbs, so nuns at a Hollywood convent famous for its pumpkin bread are warning that they may have to slice up the place for development. The threat of a shutdown of the 75-year-old Monastery of the Angels below the Hollywood sign has prompted neighbors and supporters to mount a campaign to save the four-acre religious retreat. The volunteers say they may turn to the nuns' moist and fragrant pumpkin bread to help make up a cash shortfall that has slashed the monastery's operating budget by more than 70%.