I have just recently moved house and taken my rats with me. They are about a year old now and they are very nervous and skittish. Usually if leave the cage open the hop out and explore but now they won't even leave at all. They hide away in their house and they are shying away from my hand. Is this normal after a move? Do they just need time to settle? if so how long does this usually take? I don't want to stress them out at all so i am leaving them alone for now.