Puppy temperament tests can help predict a puppy's future behavior and suitability for different owners, but they are not perfect. Testing can start as early as 7 weeks of age, but testing between 3 to 4 months may yield more accurate results. Temperament tests can measure a puppy’s stability, shyness, aggressiveness, and friendliness. If the pup shows unprovoked aggression, panics and cannot overcome this, or exhibits strong avoidance, then that is a pup that may need more rehabilitation work or socialization than most owners can provide. You can perform simple puppy assessments for puppies over the age of 7 weeks old, such as the noise sensitivity test, people-friendly test, and puppy toy test. These tests can help you ascertain whether a dog is more independent, prone to attachment issues and separation anxiety, or more calm and easygoing. Pups usually fall into three broad categories: Independent, Super needy, or Middle of the road, which can indicate a tendency toward more independent behavior, overattachment issues, or a healthy attachment and an easygoing personality. Early socialization, proper training, and interventions can mitigate potential negative behaviors identified through temperament testing.