I got one soft shelled egg when my girls first started laying. Within three days I have gotten 2 more soft shells. On Monday the soft shelled egg made 9 eggs from my 89 chickens. First of all, is it time for some oyster shell in their diet? Secondly, I live on an Island so I have to order all my supplies a day or so in advance and then pick them up from the boat dock. I've ordered twice already this week. So, I was wondering is there another way to give them a little calcium boost in their diet? I can still get oyster shells but it'd be easier if I could give them something else in the meantime.