I had this happen to one of my dogs. I went to the shelter and picked her out to go walk and see if we vibed. I was warned she doesn't like men and growled/snipped at the workers. She was the chilliest dog from the start, I was picking her up and holding her when I went back to the front desk. They said, alright I guess she's meant for you.

Even with my 2nd pup, when we went to go get her, I sat on the ground waiting for her to be let loose and she immediately ran right to me and sat in my lap. I think Ace Ventura might be an uncle.