My hens had very difficult times passing the soft shelled eggs they suffered partial paralysis of the legs and I wasn't sure they would make it, but they did. I understand Birdrain's hen was the same way, unable to walk for awhile. Were your's like this too, perhaps there are varying degrees of severity? I've experienced this 3 times over the past 20 years, so it doesn't happen that often, but each time I know they quit laying for at least a month or longer. I have Calcium Gluconate liquid on hand now and if it happens again that is the first thing they will get.