Over-socialization or unpleasant socialization can be just as bad as insufficient socialization. (operationsocialization.com)
While there is some risk that your puppy could contract an illness from such exposure, far more dogs are surrendered to shelters because they received insufficient socialization to dogs and people at an early age and become excessively fearful or aggressive. (vetmed.tufts.edu)
While many people fret over exposing puppies to communicable diseases, the fact is that more dogs die from behavior issues caused by insufficient socialization than from disease. (animalcafe.co)