Friend of mine adopted two "retirees". One was perfect, the upside down on the settee bit, everything - the other was totally hyper, jumped at noises, tore round the place like a mad thing, and eventually had to be returned to the rescue. She was experienced with dogs so it wasn't a novice thing.

They don't need much exercise, but the chase instinct remains forever and most responsible rescues warn of this and won't rehome to where there are "small furries" as they call them.

Some are OK with cats, some not. You might need a bigger sofa though, or you'll be sitting on the floor. Those legs get everywhere.

Good luck

Paws