I have 6 originals (3 Rhode Island Reds & 3 Golden Comets). Goldens seem hardier and have been laying for about 1-1/2 weeks. I believe only one of the Reds is laying. I switched all over to layer when the 1st egg came. I recently aquired 3 more(1 RIR & 2 GC). They were on same feed mixed with cracked corn and also on oyster shells(which I just started with the first 6). They are still separated, but would like all on same rations. Now I'm noticing soft eggs and one that has stopped laying. Is this normal? Should I be offering something more?