I suppose it's been asked before, but...
Our indoor cat is about 6, and is bored. I'm sure of it. I'm always reading or on the computer, my wife is always reading or watching TV, and the cat sleeps about 22 hours a day. Whenever we have visitors (rarely), she is always twining around, but I'm pretty sure she is bored.
We are thinking of getting another cat, as company for her. What do you think? At 6 years old, and never having known another cat, will she accept a newcomer? Would a kitten be seen as less threatening?