I have a amber sex link hen that will be 2 April 17th and she has started to hard molt it is horrible I live in WI and lately its been in the single and negative numbers should I be worried about her? there is no additional heat or light supplied in the coop. and they are all feed free choice of grit oyster shell and scratch along with feather fixer, and any table scraps. she is the last to molt should I be worried about her getting cold or anything?