Take a pan and put in about 8 cups of feed. Wet it till it is all mushy. Stir in 3 tablespoons of powdered cayenne pepper. Mix it in well and give it to the girls. They love this and birds do NOT FEEL HEAT. It does help. I do this twice a week for my birds. But your soft shelled/no shelled eggs indicate a problem with calcium too. Try the Tums. And ... are you sure that these were young birds? I have old ladies that do this all the time.