Have been feeding my ducks layer feed for a long time. My ducks were laying all winter, slowed down but still laying. Problem switched to wild feed because my husband decided we needed more niacin. They have dropped off from laying and today found one of my harlequis dead and the other weak and dying. The feed is not medicated. I have many different ducks, but the harlequin is the problem. My thought that maybe the geese are hurting them or its the feed. Anyone have another idea.