Dog castration involves trade-offs between behavioral benefits, health risks, and welfare considerations. Understanding the evidence helps owners make informed decisions for their individual dog.
Dog castration decisions require balancing health benefits including elimination of testicular cancer and reduced prostate disease risk against potential risks in large breeds of delayed joint maturity effects on orthopedic development and altered cancer risk profiles. Behavioral impacts including reduced roaming and inter-male aggression can significantly improve welfare for dogs that show these testosterone-driven behaviors. However, castration does not reliably address fear-based aggression and may worsen anxiety in some dogs. The welfare of the whole dog including temperament, breed, age, and lifestyle factors should guide timing and decision rather than routine early neutering for all dogs.