Today I found one of the buttons dead in it's cage. I felt her vent area and could feel an egg. I have 2 other buttons that haven't laid in a couple days and have been sitting around fluffed up, not doing much. I checked them both and they are egg bound as well. I took those 2 girls and placed them in a warm bath. I left them there for 15 minutes. When I returned to check on them, there was lots of poop but no eggs. I decided I was going to manually encourage the egg to dispel. After some effort and slow manipulation, both eggs were delivered. One of the hens looks a lot better than the other, but I guess I did what I could. These buttons are 9-10 weeks old and have been laying since 7 1/2 weeks. How can I reduce the chances of this happening again?