One of my pullets (black sex link) just up and died on me. No visable trauma, birds are well fed and get fresh water every day. The rest look healthy. They are about 26 or 27 weeks old. Weird. Any ideas? Now I only have 19 pullets. I was getting an average of 18 eggs a day from the 20 pullets. I have gotten 19 and sometimes 20 a day.