I have a Black Australorp hen that is 21 months old. She has always laid very very large, funky shaped eggs, and thin shelled eggs. It takes her nearly 2 hours to lay her eggs. Over the past month, she as laid 2 eggs with no shell, but had the inner membrane on them. All this past week, she has been going in and out of the nest box and coming out with no egg laid. At one point I thought she was going broody due to her obsession with sitting in the nest box every day. Even some evenings and nights. Well, yesterday, out of nowhere, she started looking sick and was having liquid diarrhea. I gave her a good feel all over and she did not have any swelling in her abdomen, or stuck eggs at her vent, but her crop was distended. I gave her a vomiting and kept her in a cage over night with a heat lamp, as the temps were going to be in the single digits. She was not eating or drinking at the time, so keeping her warm was all I could think of. This morning when I looked in on her, over night she had laid just a yolk. She was more perky this morning as well, although her crop was still a bit swollen. So I gave her some soda crackers along with her layer feed and then let her out of the cage. She headed straight for the coop nest boxes, where she still is, attempting to lay an egg. Are these the signs of an internal layer? And if so, how long can or does this go on until it eventually kills her? Should I bother with antibiotics, even though she will continue to internally lay? Thanks so much everybody.