My 19 year old granddaughter moved in with me 4 weeks ago and adopted a 4 week old kitten then. I have 2 cats. One occasionally picks on the other one who is always scared and hides. My granddaughter will not let her kitten out of her room at all because she thinks My cat that sometimes picks on her littermate sister will hurt her. My granddaughter is often gone all day, and all night, she only comes home to feed the kitten. I think her kitten gets lonely and bored. It's always dark in her room with the room darkening curtains being closed. I did open the curtains for the kitten to get some sunshine today. Will keeping her in that small room all the time cause any problems? My granddaughter won't listen to what I think about it.