Dear Bay Weekly:     Sadly I must tell you Mr. Oliver T. Owl passed away on the morning of April 17.     When I visited with Oliver at the Davidsonville Wildlife Sanctuary, rehabilitator Sandy Carr said he was doing well, eating the meat she was offering him. He seemed alert and checking everything out from his perch in an aquarium in her clinic. I had an opportunity to stroke his rear neck feathers — oh, so soft — and he didn’t seem to mind....