I've had doves for 15 years and never have had this happen. I've been finding 2-3 dead every morning for the past week. I don't know why. The food and environment has been the same for years. I live in NE Wisconsin. It's been wet, but we've had wet weather before and this hasn't happened. The coop is dry. I don't know what to do. Can anyone shed any light or give advice?