I have 3 bantam hens who have been regular egg layers, except when molting. They are now 5-6 years old and have not laid much this spring or summer. None of them. They are energetic, bright eyed, feathered (not molting), get plenty of layer crumbles (dry and a mash), grit, greens, seeds, raisins, etc. Not stressed either that I can tell. They are kept up at night, have an aviary for daytime or an indoor coop, and are able to range in the late afternoon/early evening if they want. One girl did lay one egg a few days ago and it broke, or she broke it. Nothing prior to that for months. Are they considered to be seniors and have just reached an age to stop laying? Odd that all three have, but they are the same age, size and breed and have always been together.