New to raising quail Help!

I have taken on this new adventure and love my little quails but now I have come across some issues and do not know what is going on. make a long story short as possible. about 3 wks ago I purchased 5 girls 2 boys. I was told they were 4 weeks. but after first wk 2 started laying eggs. about one a day. then last week they all started losing feathers. so put something up was told it was probably just then losing their baby feathers. but now a week later and they are still losing feathers. They are not bald or anything like that. I have them in the garage separated boys/girls. No fighting. I changed there food for egg laying this last weekend. Ok not the next piece to the story, they now are not laying. HELP! I checked for mites because I was reading that could cause feather loss, don't see anything, but they are all eating and drinking. I use pine shavings for there dropping under there cage. I have read that the weather will stop them from laying. Am I over reacting? In the past I have raised ducks, rabbits, dogs, cats, opossums, lizards, hamsters, guine pigs, so I am not new to animals. but this one has got me scratching my head. Any and all help would be Greatly appreciated. I hope they are ok. Thanks for any and all help in advance

 

They are coturnix quail, The gentleman I bought them from had them on turkey starter, and then last week I started them on purina game bird chow, but they stopped laying a couple days before I changed there food. When I had first gotten them it was sunny almost like spring weather, but the last week it has gotten colder and is starting to rain. That is why I am thinking they are not laying. I would like them to lay again but I do not want to put to much stress on them. If they are molting how long do they do this for? I am making them a house outdoors but want to make sure they are ok before I do any moving. Thank you so much waterfowl. I hope this info helps. They are pretty cool little birds and I love the sound of the roos.