My cat Tiny always seems to sleep on his back, its a habit he has had all of his life, other friends who have cats, do not seem to notice their cats doing so, and i have seen cats in the area , they certainly do not. now the little cat i introduced a year ago, (when tiny was 6, and they bonded immediately) is also sleeping on his back, except when they are cuddled together which also happens often. is the little one just copying the habits of the older cat.??