Loosing your ducks to predators is heartbreaking but when we allow them to free range then it's going to happen. I let mine out during the day and lock them up at night. I have lost 6 so far this year but I know it's going to happen. I know that sounds cruel but keeping them penned up is cruel as well in my opinion. In the past it has been raccoons, coyotes and fox. This summer my nemices is bobcat!