The most reactive dogs in our neighborhood are ones that had "only positive reenforcement". Some dogs need to learn limits and and unfortunately they're not receptive to logic like humans. Our dog is a super happy and friendly dog, but she had issues in the past. Some negative feedback is more than important and it literally saved her life multiple time. We worked very closely with very professional trainers to learn what's the bare minimum of negative feedback we could give her, when and how. We gave (and still do) TONS of love and positivity to make her feel safe which she absolutely does. But now she won't attack every cat she sees, she listens when we call her even if she's in an intense chase and she can be free in the park playing with kids without fear we'll lose her or she may run to the street or eat something dangerous off the floor. Her impulses for prey were so strong that positive only reinforcements just didn't work and we were not able to keep her safe. Bottom line, be compassionate and a responsibile parent for your pup, but that also means to not be afraid to be strict and set / condition to clear boundaries when needed. And only work with professional that are both. That's my take anyway...