@selenag Your flock free ranges and that is key here. If combs are plump and red then they are laying eggs and you are just not finding them. Chickens can be very creative about where they lay. It may be that you are not finding their secret nest or a predator is finding the eggs before you are. Rats and snakes and countless other animals will take eggs or perhaps they are laying on a neighbours property and your neighbour is benefitting from your hens' efforts.
Of course, at this time of year, hens over a year old may have stopped laying and be in moult or recovering from moult but they will certainly have been producing eggs during the summer. The only way to get their eggs will be to confine them to a run for a week or two, so that they have no option but to lay in their nest boxes. It might help to put curtains across your nest boxes if they are not sufficiently private that the hens don't approve. Some fake eggs in the nest boxes can sometimes encourage them to lay in the right place.
@redheadedhens It is likely that your girl is also laying away somewhere. Tiny "Fairy Eggs" sometimes occur towards the end of their laying cycle as they approach moult or sometimes when they are starting up after moult and can pop out when they are not expecting it so it may be that is why you got that one.... the fact that she is flighty makes it more likely that she has a secret nest somewhere.