I have a problem with my dog and I would kindly ask for some
My dog doesn´t like strangers. If somebody wants to pat him (unknown grown person) he starts to barking at him. In other hands, he adore children and other dogs, no matter if they M or F.
In fact, when he sees person second time, he is like a baby.
So ,what should I do with this first contact with unknown people?
Is this only his nature or I have a really big problem?