My wonderful layer a coming 3yo Black Astralorp has stopped laying all of a sudden. She is not moulting. She started laying mid-February, nice big eggs at about 3-4 eggs/week then in the past 2.5 weeks she hasn't lay an egg at all. Her hen mates, an Ameraucan of the same age is laying her usual 4 eggs a week and a year younger Ameraucana mix (don't really know her breed at all) is laying 4-5 eggs/week. We have had funky weather with warm then snow then warm then snow. We live in Northeast MA. Any ideas on how to figure out the problem? She seems healthy otherwise.