I have 4 chooks; a Black Australorp (Kali), Game Bantam (Myf), Game Bantam x Rhode Island (Itchy), ISA Brown (Penny) and a Game Bantam x Pekin rooster (Roger). I get regular eggs from all but the Isa Brown. She was a consistent layer of 70-80gm eggs giving 5 or 6 a week for about 12mths, then stopped laying in early March '19. She now spends 1/2 an hour or so in the nestbox most days, does her egg song, accepts the rooster and returns to free ranging with the others, but no egg. She moulted mid-April at the tail end of the wet and looks nice and healthy. If she was egg-bound she would have been dead months ago. The fact she still goes through the motions but produces no eggs is frustrating, as you can't really eat them once they have a name!