I don't think that is much fun to be kept in the whole time for a cat - a different matter if they choose to stay in - I wouldn't keep one in all the time, but my mother had a white cat (not deaf) who very seldom went outdoors and stayed on the same bed,asleep for most of her life - a friend actually thought that she was a nightwear holder! but our two boys (Tigger and Fred)used to wander in and out, but we kept them in at night - we used to have a lot of foxes where we used to live. The most worrying bit is when they first start to explore the boundaries, but we used to let Tig out a little while before he was due to have his supper, so you could be fairly sure of him returning when he was being called for supper - it does help if your cat is a bit of a pig! and then gradually increased the time he was allowed out, which seemed to work well for him - he got to 16.5 years old, and was only ever out for the night once in his life! Best of luck with your kitten, and I hope you have lots of fun with her.