My wife and I took in three Brahma hens last October from a friend of hers, a couple of years old we were told, 2 or 3. We got a couple of deformed eggs from them, then nothing until a few weeks ago. Our Red Stars have been producing eggs through the winter, eating the same feed, no problems at all. Now that the Brahmas have begun laying again, one is laying normal eggs, but the other two are still laying deformed eggs. They look like hollow chocolate eggs that have been set somewhere warm, kind of flattened a little, and the "top"sunk down in. The shells are very thin, and are often cracked at the least, sometimes with a hole in the sunken part. Some times they eat them, but they have been leaving the normal eggs alone, and sometimes they don't eat them, they are just broken and soak a big chunk of the nest box. My first thought (when we first got them) was a feed issue, but they have been eating the same as the other chickens for 5 or 6 months now, I don't see how that could be it. Am I wrong, or is this something else I don't know of? I haven't read anything about this, anybody have any ideas?