I got mY 3yr old St. Bernard, Rocky a little over a month ago. When he first came to our home, he showed some aggression towards my hubby. But after a day of Hubby giving him lots of love and attention, they have worked things out. Now Rocky adores hubby. Since then, many people have come to the house and met Rocky, he adores children and women but so far no men have come to the house. Till today! My FIL came to the house. My FIL came in the house, and started to say hello to rocky, and put his hand out for Rocky to sniff, and Rocky put it in his mouth, and growled! thankfully Rocky did not break any skin, but my FIL was freaked out! I didnt even realize that my FIL was the first strange male to come to our house since we had Rocky till after the fact. I am concerned that we are going to have this problem everytime a male comes to the house! He came to us from an elderly man, so this behavior baffles me! is there any way i can change this behavior???