Hi I am new to raising birds but this morning I found all of my silkie chickens except 1, guineas and peacock dead. I am in virginia and it has been raining a lot the past 2 days. The birds are in a coop that they can go into to get out of the rain. The youngest bird is 9 weeks old. They were found outside not all huddled together but found in different areas but outside. Any ideas as to what could have happened. Any suggestions would be greatly appreciated. The one that was found alive was slightly wet and inside of coop.