Childhood and adolescent animal cruelty and subsequent interpersonal violence in adulthood : A review of the literature

Animal cruelty has been a growing concern worldwide, and is broadly defined as all socially unacceptable behaviors that are intentionally perpetrated to cause unnecessary pain, suffering, distress, and/or death to an animal. This review synthesizes more than 87 research studies identified through online databases and manual search of specific studies. Findings denote that beating, hitting, or kicking, shooting, strangling or smothering, stabbing, and sexual abusing are reported to be the commonly used methods in abusing animals. In addition, children and adolescents abused animals for different reasons; and those who exposed to domestic violence are likely to have higher rates of animal cruelty, which in turn increases their subsequent propensity to engage in delinquent behavior. Male children and adolescents are more likely than their female counterparts to commit acts of animal cruelty. It is noteworthy that early onset of animal cruelty acts is suggested to be predictive of subsequent violent or antisocial behavior. Arguably, bestiality is an act of animal abuse, or specifically as interspecies sexual abuse. More importantly, this review has noted a strong support for the increased risk of children and adolescents who commit animal cruelty to perpetrate interpersonal violence against human victims in later life. Five key theoretical models (i.e., social learning theory, frustration theory, deviance generalization hypothesis, graduation hypothesis, and sexual polymorphous theory) are discussed to explain the link between childhood and/or adolescent animal cruelty and subsequent violence against human victims in adulthood. Implications for research and future research are discussed.