Medical conditions including pain, hypothyroidism, and neurological disease can drive interdog aggression, requiring medical investigation before behavioral treatment of household conflicts.
Medical investigation before behavioral intervention in interdog aggression cases is a welfare imperative that the field has historically underemphasized. Behavioral treatment of aggression with a medical cause is not only ineffective but causes welfare harm: the aggressive dog is subjected to behavior modification that addresses a symptom rather than its cause, while the victim dog continues to face risk. A thorough medical workup — including pain assessment, thyroid panel, neurological examination, and sometimes MRI — before committing to behavioral management prevents this welfare harm and sometimes reveals treatable conditions where medical management alone resolves the aggression.