Bay Area filmmakers make right choice with guide dog documentary ‘Pick of the Litter’

Summary: Documentary filmmaker Dana Nachman was in the midst of a conference call about “Pick of the Litter,” her revelatory new film on training guide dogs. Suddenly, a bark could be heard in the background. It emanated from her own pet, PC (short for Princess Chaling) who, she believes, got excited by a gardener’s knock at her home in Los Altos.