I recently purchased 150 cots and for the last 2 days they have been dying. I found 13 dead yesterday and 10 dead today. They are in 2 separate cages that are 10x2x2 each. They are on a 20 percent protein feed. I have 40 others that I've kept in a room on pine shavings and they are perfectly fine. The birds are missing a lot of their feathers (mostly on their backs) they were like this when I bought them. I'm worried they could have a disease or something, anyone have any clue what is happening? P.s the cages are inside a barn so there is zero wind on them. The temps have been in the 30's the last few days but they also have heat lamps on them.