Can any of you chicken experts look at poor Gretchen's underside and tell me about how long until new feathers are in? Days? Weeks? Lows are near zero, highs just in the teens or lower here with neg windchill. She seemed lethargic and wasn't coming out of the coop today like other girls so I put her and a buddy in the garage (where it's 33 degrees instead of zero). Wondering how long it takes feathers grow in from a hard molt.