We adopted my 10-year-old lab from a family who left him outside all the time, he was rarely allowed in the house even in the case of a blizzard or storm. when we adopted him it took us several weeks of luring him in the house with treats and giving him lots of praise when he came in. Now he runs into the house with the other dog just fine.
He also doesn't play with toys. Nothing, nada, ziltch. He will occasionally chew on a Nylabone and he loves raw bones. (Cow femer only) Eventually we gave up trying to get him to play with toys, he's very chill and we love him for it.