I have silkie and silkie crosses that I have been getting. I have 3 broody silkies out in the coop and all of them are full of eggs. I havent been using my incubator because I would prefer them to be naturally set on just because the chicks are healthier. But recently when I take the chicks in (once they hatch I take them inside so I dont brake the broody), withing a week most seem to become lethargic and die. No other symptoms, they eat and drink, no nasal discharge, runny eyes...some seem like they have pasty butts but I though that was normal with such a fluffy silkie chick and I just keep them clean. Could their be a disease they are getting that just doesnt show symptoms? What do I do?