I have several Silver phoenix bantam hens and a rooster and two weeks ago they stopped laying for some reason. They are a little over 1 year old and have a light on them that gets turned off late at night and then turned back on in the morning. I have seen a couple of the hens go into the nesting box and sit in there and look like they are laying eggs, but when I check for eggs, nothing. They were laying about two weeks ago, but now they just stopped. Any advice on how I can get them laying again?