[CLEO & CEASAR]

I am not so sure... From the time we got them at three months old, as soon as they got all their shots we've taken them to dog parks, they've been around people (families, friends, strangers) and we've taken them with us almost everywhere we go. BUT... they still react in various ways to different situations...different times...
I could say Ceasar is the calmer one...on our walks...which averages to three times a week...it would be Cleo who would react/barks to strollers, to people wearing hoods and caps, other dogs especially bigger dogs while Ceasar would just almost always ignore them...he would sometimes join in but not as often as Cleo would bark. They love kids and mostly all adults...but for some reason she would bark at an adult which I cannot really say & tell why. I always correct her when she barks...I would stop and bend down and abruptly touch her neck (not really hurting her) to let her know that barking right that time is not good. But she still does it everytime we would go for walks. This is still frustrating me. ANY HELP?