My bully hen sat tight on 6 now......everything crossed....plus 2 got smashed. Redpolls nesting only material they using is cotton so far offered them all of the natural stuff you mentioned. 2 pairs glosters both sat on 4. Yellow lippochromes sat on 3 and 5 pairs fifes and one pair red factors all sat on eggs.....excited much. Hope ending is as good as this bit.....lol