I have a hen in her 2nd or 3rd laying season. She was given to me last fall ( almost 10 months ago). She's a little red oliver egger. She lays ALMOST EVERYDAY without fail. She rattels ... a LOT... sometimes she'll do it for a week or more. I isolate her and the rales go away... or the don't. But she has no other symptoms. She will lay rough textured eggs, but just slightly on one end. Sometimes the color will lighten for a few weeks and then goes back to a dark olive. She always has a poopy butt, and sometimes runny poo, it's never been different. NONE of my other 10 hens or roo act sick or have ever acted sick. She will sneeze on occasion. Should I cull her? I do not want a problem. It's now at least the 3rd time I've isolated her in 9 months. I've never had to cull one but I will if it's a chronic thing that will sicken my other chiken.