I have a 1.5 year old brother and sister Bichon/American Eskimo cross. The female barks at other dogs and barks/charges strangers but stops in front of them and continues to bark until I am able to move her away. She is not off-leash although she stays with us at the beach and dog park off leash. The male reacts the same to other dogs and strangers except he has bitten twice both times not breaking the skin but leaving a bruise. One of these times another dog was approaching us while we were on a walk and he bit my ankle in my attempt to stop him from barking/lunging. The second instance was when a 7 year old child entered my home to use the washroom. The male dog is never able to be off leash for the previous mentioned as well as he would take off the first opportunity presented. Both dogs do well in doggy day care if they go separately. I bring treats when I walk them to distract them when people/dogs pass us. I do not know how to change their response to other dogs and people. Within our home, they are very sweet and never show aggression to our family. Are their personalities able to be adjusted?