[:@]I would love to beat the owner too, blackline...BUT
I have had several dogs that were abused...It took WEEKS for them to learn that I was just gonna love and feed them. FEED is the secret in the end. They learn to trust you everytime you feed thm. It will take TIME, but they will soon learn that you are NOT going to hurt them. Like in the movie "Dances With Wolves" let him come to you for a treat!
Best of luck to you and God Bless you for your kindness for Man's Best Friend!!