Full disclosure: I cried a whole lot watching the first two episodes of the Disney+ docu-series Pick of the Litter. Based on the 2018 documentary of the same name and executive produced by Dana Nachman, Don Hardy, Mary Celenza, and Josh & Dan Braun, Pick of the Litter is as heartwarming as it is insightful in tracking the journey of six dogs — Pacino, Tulane, Raffi, Amara, Paco, and Tartan — who are in training to become certified guide dogs through the Guide Dogs for the Blind organization. Along the way, viewers learn not only of the rigorous process a dog …