I have 6 mixed reds and they have been acting funny. Some were semi molting like on their breast and now I have not gotten eggs for 2 days. 2 of my eggs from thursday had a speck of blood in it. They are a year and a half old and were fine last winter. Could this be something else? We did just tarp up the coop for winter but light does get in... we do need to clean it out but that hasn't been an issue before ...