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Oscar the Cat awakens from his nap, opening a single eye to survey his kingdom. From atop the desk in the doctor's charting area, the cat peers down the two wings of the nursing home's advanced dementia unit. All quiet on the western and eastern fronts. Slowly, he rises and extravagantly stretches his 2-year-old frame, first backward and then forward. He sits up and considers his next move.In the distance, a resident approaches. It is Mrs. P., who has been living on the dementia unit's third floor for 3 years now. She has long forgotten her family, even though . . .