My senior cat, Grandma, will pick one spot to sleep in for weeks or even months. Then she tires of it and moves to another. She took to sleeping under the bed last month which worried me. Now she has decided she wants to sleep right in the middle of the carpet under the ac vent in the bedroom. She eats, drinks and does her 'business' fine. AND still gets in bed with me and smacks me with her treat bag should I neglect giving her some. Guess she just likes a change of scenery. Maybe Luna is going through that too. So, glad she is feeling better.