I'm new here. I appreciate any advice as I have never had chickens before. I have 8 chicks all the same age - 3 weeks approximately. 3 silkies, 3 Frizzles, 2 Ameracaunas. They are in a Rubbermaid plastic tub with shavings (which are a nightmare and someone told me to buy pellets which I bought today) and a 60 watt lightbulb/lamp. They are running out of room and I just finished today making a temporary coop out of an old kitchen cabinet and some hardware cloth while I build their permanent home. I noticed yesterday that all of them have bare chests, sort of like a line of bare skin running down the middle of their chest. I notice they are starting to feather ... is this normal or is something wrong? Is this just losing the down while the feathers come in?