I've got a 15 year old tabby cat who has been wonderful for so many years! Recently (last couple months) she's been waking us up at all early hours of the morning. We think she's hungry, so we feed her. But say we feed her because she's crying at 3:30am, she'll cry again at 5:30 or 7:00, like she never ate the first time! It's been very aggrevating because now we can't get a good night's rest! Is our cat just loosing her mind? We've even started feeding her at night before we go to bed, and in the morning. It doesn't help. Any suggestions?