Is it the springiness of the mattress?
I am getting a new bed (for me) and thought that I could use my old bed for my cat. But this means paying somebody to saw the mattress into a size that fits my bedroom. Will this be worth it? Will my cat like it?
I hate to wake her up from my bed, but she leaves once I sit on the bed, she knows I will soon be in it, and take up too much space for her liking, and so she leaves. But she does love the bed lately, in spite of her several other cosy sleeping spots.