I bought 4 sussex and 3 black orphingtons in July, supposed to be 4-5 months old then, The day we got them they all laid and now only one of the black orphingtons lay, I am about to cull the other 6 that are not laying as I cannot afford to feed what isn't laying. The get enough light, have enough food, free range during the day, enough nesting boxes, special treats, I just don't know what to do, I hate to put down young birds but if they aren't laying what am I to do?? All of my other birds are laying and I have 17 red stars that will lay in the next few weeks. Help?!?!