I have had Golden Comets, lay lots of eggs but a few died from being egg bound and the other never lived very long. Black Australorps are our absolute favorite and most reliable layers of HUGE eggs. Our oldest are 6+ years old and yes I do think we may get an egg from them every once in a while. They start out laying medium sized eggs but then will progressively get larger the older they get. Our old girls are laying XL-Jumbo weight eggs or bigger. I have a metal scale and it bottoms out on most.