Resource guarding in dogs is a normal behavioral trait that becomes a welfare and safety concern when it leads to aggression, requiring appropriate behavior management.
Food guarding in dogs creates welfare concerns for both the dog experiencing the stress of guarding and for other animals or humans who may be at risk of biting injuries. Dogs engaged in guarding are in a state of defensive tension and anxiety that is itself a negative welfare state, regardless of whether aggression occurs. Punishment-based responses to guarding cause dogs to suppress warning signals (growling, stiffening) without reducing the underlying motivation, creating a dog that bites without warning - a worse welfare and safety outcome than the original behavior. Positive behavior modification approaches that reduce anxiety around resources and teach dogs that human approach predicts good outcomes address the welfare cause rather than suppressing its expression.