Hi,
I have been having problems with one of my Buff Orpington hens displaying egg bound symptoms also, with the dragging bottom and barely walking, hardly eating. I did some research and found a product called Calciboost which is Liquid Calcium, Magnesium, and Vitamin D3. It's supposed to help birds that are egg bound and calcium deficient. I gave my hen this and she seemed to improve. She laid soft shell eggs at first and now she laid a soft shell and hard shell all in one day. I finally broke down and took her to a Vet and his advice after x-rays was all her organs looked normal and he could see an egg but it looked thin shelled, but her oviduct looked in tact (all though x-rays can't see everything) and after conferring with an Avian expert, they wanted me to try to change her feed. I had not been feeding her Layers feed but trying to give her supplements that would give her the calcium and vitamins (more organic) that she needed. She's the only hen I've had problems with since I've switched feeds. So the advice was that poultry experts put a lot of research into making the feed for the birds' health and the egg production and to put her back on a layers feed. He said a few months should tell, but I feel like at least the Calciboost has helped her lay the eggs she's producing and she's not egg bound. The Vet agreed that I was right that she has a calcium problem but for me to be careful with administering the Vitamin D3, that too much could take a toll on her kidneys. She is now eating the Layena Plus and has been on it a week and a half. I'm crossing my fingers this helps her. I'm still giving her the Calciboost but not as often.