I'm having a problem with my 16 year old cat who came to live with me recently. He was staying at my mother's house outdoors all the time. Now he's at my apartment and he's an indoor/outdoor cat but he's supposed to be only an outdoor cat, per the landlord. I keep him locked in my bedroom all night, however, he meows frequently and is keeping me awake most of the night. Even when I pet him & give him lots of attention, he still wants to get out of the bedroom. He has access to food, water & the litter box in the bedroom. I can't keep him outdoors at night as he will wake up the neighbors by meowing wanting in the house & they may complain. When he first came to my house, he seemed to be OK at night, only needing a little attention. But it's gotten to the point where I only get a couple hours of sleep a night. Any suggestions?