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The veterinary profession has a unique responsibility to animals during the final stages of their lives. The veterinarian's obligations extend to humane endings, involving all species of animals in a range of circumstances including, but not limited to, euthanasia of individually owned animals, euthanasia of animals for research purposes, depopulation of animals during emergencies, and slaughter of animals raised for food. The veterinary profession continues to improve animal welfare through advances in end-of-life decision-making and humane killing techniques,1-3 but the psychological impacts on veterinarians have not received the same level of consideration. Building on the influential AVMA Humane Endings Guideline, the AVMA recognizes that support for the mental health of veterinarians engaged in such activities needs to be a priority. This article aims to provide the foundation and rationale for improved preparation and establishment of sustainable mental health resources and to offer recommendations on pragmatic solutions to support and prepare veterinary professionals as leaders impacted by participation in humane endings-related activities. While end-of-life decision-making and implementation may present mental health challenges to veterinarians, it is crucial to recognize that there are stressors specific to each situation and that every individual's experience is valid. Addressing the mental health issues surrounding the decision-making process and implementation of humane endings activities start with a comprehensive understanding of each activity's unique context and the veterinarian's leadership role. Therefore, this article highlights the psychological impact of depopulation and its similarities and exclusive challenges compared with euthanasia and humane slaughter.

Using a computer-generated data base of rankings of 56 breeds of dogs on 13 behavioral traits, a factor analysis was performed to determine the extent to which a few general underlying behavioral tendencies are manifested in specific characteristics. Three factors, referred to as reactivity, aggression, and trainability, accounted for 81% of the variance in the 13 behavioral traits. Subsequently, a cluster analysis was performed to generate 7 clusters of dog breeds on the basis of similarity in scores for each of the 3 main factors. The clusters reflected to some degree the conventional groupings of dogs into working, sporting, hound, and terrier breeds. A quantitative analysis of the ranking of male dogs vs female dogs for the 13 characteristics revealed that males differed from females on 10 traits. It was concluded that these gender and cluster profiles will allow people to select a breed or gender of dog that is most likely to match the emotional and physical needs of the person who will provide a home for the pet.