My daughter's grey, Yogi, was one of the shy ones. Lots of OCD, up and down stairs whenever anyone visited, hiding in the bedroom, pacing and circling around the dining room table. A year later, he's a laid back hound who comes around for attention and acts like he's lived there all his life. He's not the best dog on a leash--he'd rather hang around the house--but even that is getting better. Yogi turned out to be an awesome pet and we all learned a lesson in being patient.