So I have read over some threads and none answered my question so here goes... I have lost 3 birds over the last 3 weeks. The first was a female Appenzeller, she was around 6 months old raised her since day old. One day she was all puffy head tucked into herself, the next morning she was gone (cute note if there can be one two of my cockerels were standing guard for her), The next to go was an 18 month old isn ISA Red she was a lil ratty looking but had shown no signs of anything, was just gone one morning when I went to check. Then this morning Beaky my female Polish also 6 months had passed away (she got her name as a day old her beak was never aligned and as time went on it became worse it was basically at a 90 degree angle, we always wondered how long she would make it) This is my first year keeping chickens and the road has not been smooth... We are keeping them in a converted grain bin. My first batch of pullets were murdered by a mink all 10 in one night dang animal... So the next time we sealed it up much better and have had no animal problems. This leads to my question, are these just the weak birds that can not handle the cold? Or is there something else going on that I'm just not understanding.