My sister has moved from a flat to a house about 2 weeks ago. Her cat Rudy, she has kept in the new home but all he wanted to do is to hide upstairs. For two weeks he has come on he does come down stairs only at night time on his own and have something to eat and use the cat litter tray. During the day he upstairs hiding he will only come down stairs if someone gets him. He is normally an outdoor cat. But my sister wants him to get used to the house before she will allow him outside.