We hypothesize that selection during dog domestication targeted CNVs associated with hypersociability.

Past research has suggested that a variety of factors, phylogenetic and ontogenetic, play a role in how canines behave during problem-solving tasks and the degree to which the presence of a human influences their problem-solving behaviour. While comparisons between socialized wolves and domestic dogs have commonly been used to tease apart these predictive factors, in many cases a single dog population, often pets, have been used for these comparisons. Less is understood about how different populations of dogs may behave when compared with wolves, or with each other, during an independent problem-solving task. This experiment compared the independent persistence of four populations of canines (two groups of pet domestic dogs, a group of free-ranging domestic dogs, and human-socialized wolves) on an independent problem-solving task in the presence of an on looking human. Results showed that wolves persisted the most at the task while free-ranging dogs persisted the least. Free-ranging dogs gazed at the human experimenter for the longest durations during the task. While further research is needed to understand why these differences exist, this study demonstrates that dogs, even those living outside human homes as scavengers, show comparatively low levels of persistence when confronted with a solvable task in the presence of a human as well as significantly greater duration of human-directed gaze when compared with wolves.

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Research suggests that humans can form strong attachments to their pets, and at least some pets display attachment behaviors toward their human caretakers. In some cases, these bonds have been found to support or enhance the physical and emotional well-being of both species. Most human–animal interaction research to date has focused on adult owners, and therefore less is known about childhood pet attachment. However, there is growing evidence that pets may play an important role in the development and well-being of children, as well as adult family members. Research conducted to date suggests that child–pet relationships may be especially impactful for children who do not have stable or secure attachments to their human caretakers. However, given that human–animal interactions, including pet ownership, can also introduce some risks, there is considerable value in understanding the nature of child–pet attachments, including the potential benefits of these relationships, from a scientific perspective. The purpose of this review is to provide background and a brief overview of the research that has been conducted on childhood attachment to pets, as well as to identify areas where more research would be beneficial.

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