Hi Jamie, glad to hear you are hanging in there - hopefully morning sickness will abate soon.
I agree that lighting is probably the issue, combined with regrowing feathers (takes a lot of protein for that). How many hours are they getting now?
I make sure that the light is on for 8 hours in the coop. I am kicking myself for not getting rid of the roosters earlier. For silkies they were really brutal.. one of my poor girls lost her tail feathers completely and one was bleeding. These roos didn't even have their spurs yet. :/