foster care with shelter staff. These dogs were office fostered during the day and fostered at home during the night. Since the dogs were technically in the shelter for 72 h and since office fostering is an acceptable routine in many shelters, these dogs were included in the study. Of the 45 dogs included in the study, 6 were intact females ,13 were spayed females, 6 were intact males and 17 were neutered males. Three female dogs had an unconfirmed spayed status at the time of the study.