Egg bound hen

I had the tricky problem this afternoon of dealing with an egg bound hen. One of my new hens appeared to be straining to pass faeces and it looked like her anus was hanging out. When I picked her up, I could feel an egg stuck inside the tube. It wasn't her anus hanging out, it was her egg tube. I took her home but I could not get the egg out. Eventually, I decided it was going to be too painful for her to release the egg whole. I therefore broke the egg inside her and removed the pieces. I felt inside her to see if there were any other eggs but there was nothing. She is staying the night in our bathroom (in a cat box) where she is warm. If she is okay tomorrow I'll take her back to the allotment.