DEAR PAW’S CORNER: My 6-year-old cat Ella has gotten very clingy lately. She was always fairly independent and preferred to lounge atop the sofa and watch the world outside the window. Now she refuses to do that. She runs to greet me at the door, meows nonstop until I feed her and then wants to climb into my lap the instant I sit down. She also begs to come into the bedroom and curl up at the end …