Stability of puppy reaction to traditional puppy aptitude test under experimentally reared condtions

The puppy aptitude test (PAT) is a general method for choosing a puppy. However, the reliability of the test has been in doubt because of its lack of a scientific base. In this report, we conducted PAT and some other behavioral tests before and after the establishment of socialization in order to investigate the stability of behavioral traits of puppies. Ten puppies were tested of eleven items on PAT at 57 and 140 days of age. The puppy’s behavior was videotaped and rated by four people using the traditional and revised scales. The results of five of the PAT items obtained a significant concordance rate between 57 and 140 days of age (P