I have a 6 1/2 month Goldendoodle. Great dog, sweet disposition. He has 90% grown out of the habit of mouthing me and my children after a lot of work to break the habit. However, he still tryies to put his whole mouth on people he meets when they come over the house. He gets very excited and he does not hurt the person, but I hate it b/c he is about 55 lbs already and unless the visitor is a dog lover the person thinks they are under attack!! I assumed once we got him to stop mouthing us he would stop it with all humans. Anything I can do?