* Physical Changes: Neutering doesn't cause any significant changes in appearance, like removing testicles. The testicles are surgically removed, but the scrotum remains.
* Behavioral Changes: While neutering often reduces aggression and roaming tendencies, these changes are not always obvious and can vary depending on the individual dog.
* Confirmation: The only way to know for sure if a male chihuahua has been neutered is to:
* Ask the breeder or previous owner: If you got your chihuahua from a breeder or adopted him, they should be able to tell you if he's neutered.
* Check his medical records: Ask your veterinarian to check your chihuahua's medical records.
If you're unsure, it's best to consult with your veterinarian. They can examine your chihuahua and provide you with a definitive answer.