A puppy’s critical socialization period runs from eight weeks to about 14 weeks, writes Pat Miller, CBCC-KA, CPDT-K. She asserts puppy owners shouldn’t put off this vital piece of development during this period.
Failure to socialize a puppy well during this period can result in significant future behavioral challenges.”
Source: Whole Dog Journal, July 12, 2022. Link. Well run puppy classes can be a benefit but avoid dog parks, socializing with random canines on the street, and do not allow the pup to investigate feces left by animals in public places.