Help! My cat’s been driving me crazy ever since she lost her sister.

Dear Most Esteemed and Knowledgeable Kitties:
My 13-year-old female, Maridette, lost her “sister” last year. “Dette” has developed a constant meowing problem, wants 24/7 attention, keeps us awake late and wakes me up early after husband leaves. She gets plenty of food, stroking, lap, and outdoor fun in warm weather. Why won’t she settle down at [...]