The Perfect Puppy - Breed Selection and Care by Veterinary Science for Behavior and Neutering Age HART, BENJAMIN L. (DISTINGUISHED PROFESSOR EMERITUS OF VETERINARY MEDICINE, SCHOOL OF VETERINARY MEDICINE, UNIVERSITY OF CALIFORNIA, DAVIS, CALIFORNIA, USA),HART, LYNETTE A. (PROFESSOR OF ANTHROZOOLOGY AND ANIMAL BEHAVIOR, SCHOOL OF VETERINARY MEDICINE, UNIVERSITY OF CALIFORNIA, DAVIS, CALIFORNIA, USA)