Inter-dog aggression in multi-dog households causes chronic stress for all animals involved and requires systematic behavioral assessment and management to restore welfare.
Inter-dog household aggression causes welfare harm to both the aggressing dog and the victim. Chronically fearful submissive dogs in households with aggressive housemates experience persistent stress, reduced access to resources, and sometimes physical injury. The aggressing dog may also experience arousal-related stress and frustration. Management strategies that separate dogs during feeding, control access to high-value resources, and provide positive experiences in proximity allow many households to find equilibrium. However, management requires sustained owner commitment — a single lapse can result in serious injury. Professional behavioral assessment distinguishes between conflict that can be safely managed and cases where separation is the honest welfare recommendation. Attempting to maintain incompatible dogs together out of attachment to both animals ultimately serves neither.