It’s 11am, and Ed Cleveland is hoisting 50-pound bags of bear chow into a small storage shed. In a mask. On an 80-degree day. As he catches his breath, he jokes with fellow keeper Deanna Edwards, who’s restocking the keeper truck for a midday feed. Then he takes a long, assessing look at stock levels and heads back to the office to book in a major delivery. For Cleveland, a 62-year-old with a long Santa Claus beard and quiet smile, it’s just one part of being head keeper at Northwest Trek – a place he’s worked at for 36 years, …