My dog is a year old and is only really bothered about me, my niece/nephew and the lady he sometimes goes to doggy day care with. When I left him with my sister he whimpered for a bit and wouldn't take any food off of her. If a stranger comes up to stroke him he will back away from some and others he will go to them and then leaves. If they give a treat he drops it and will only take it if I give it to him. He doesn't bark at them and walks past people in the street. When he was a puppy he jumped up and I trained him not to and I wonder if that is why. Does it really matter as I want to do the right thing. Thanks.