I've got a dark Brahma, 1 1/2 years old, started laying fall 2010. In spring 2011 (maybe starting in May?) she started laying jumbo, misshapen, rough eggs, with brittle shells. When cracked open, the egg white is thin and runny, and the membrane around the yolk is also very thin. She only lays appx. 2 eggs a week, while our other Brahma lays 4-5 a week. When she first started laying last fall her eggs were normal, but we haven't seen a normal one from her since this trend started this spring. She looks otherwise healthy and doesn't seem bothered. I've read a ton of posts about eggs of this description, and they all seem to suggest this happens to a couple of eggs early or late in the hen's career (which isn't the case for her) or mites. No evidence of mites. Does anyone have any ideas?