Kudos to you for seeing past his shyness! People don't realize that when dogs are surrendered, they're nursing a broken heart! Or when they've been left somewhere strange and have to fend for themselves for the first time. They are terrified. Then they get thrown in a cage with many barking animals around them. The dog's personality cannot possibly come out until he is removed from that environment and given the proper care and lots of love! I wish you both much happiness together!