Three shelter dogs who were included in the study were in 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.