Friendliness toward dogs and friendliness toward humans are two completely different things. Some dogs may attack or try to dominate other dogs, even if they’re love-bugs with people; others would rather play than fight; and some will turn tail and run. Breed isn’t the only factor. Dogs who lived with their littermates and mother until at least six to eight weeks of age and who spent lots of time playing with other dogs during puppyhood, are more likely to have good canine social skills.
