two of my pullets just turned 6 months ( a buff Orp and a EE). I have not seen any eggs yet. How can I tell if they have started? Will they put it off until the spring? I let them free range and want to finish the bag of grower feed so I put some oyster shell in a separate feeder just in case. All 3 chickens started eating it. Does this mean anything? Thanks for your input guys 
