soft shell egg

It can happen from time to time but best try and keep an eye out incase an egg breaks inside the hen when trying to lay a softie.  Make sure they eat mostly layers pellets with only a small amount of treats.  Have crushed oyster shell available at all times for them.  If it becomes regular you might want to try a little lime stome flour.  I cut a grape in half and dip it in the LSF and give it to the hen so that the rest of them don't get something they don't need.