My 6 Faverolles have all stopped laying. I used to get about an egg a day from them, now I am down to maybe 2 a week. They are 15 months old. I haven't had hens molt that young before. The Polish and Silkies were still laying at the same rate they always have, except yesterday I didn't get any from them either. Are they starting to molt? I am finding feathers but I think it's usual that they have all stopped. About a month ago I added 12 eight week old Australorps & Araucanas with them, now everyone is being fed chick starter/grower 18%, but they have free access to oyster shell. However a couple of weeks before I did I gradually changed my hens feed to starter. Is that the problem? I figured that as long as I offered oyster shell, the lack of calcium in the chick feed would be made up for. I also thought that the extra protein in the chick feed would be beneficial to the hens. Also, I have a light on a timer in the coop and they are getting 16 total hours of natural & artificial light per day. Should I switch the older hens back to layer feed? Are the 12 week old pullets to young to be fed layer? If they are starting to molt should I do a forced-molt routine to try and get them back to laying again? Thanks for your help.