Adopted cats

He seemed to settle in quite well initially, but when our friend and temporary lodger came home he became very scared, and started grumbling at everybody. He's now laying on the landing grumbling at anyone who comes near him.
His brother wouldn't come out of his carrybox for ages, and when he came out, he went and hid behind the couch and has stayed there ever since.
I'm sure they'll settle in eventually.