Su Ba wrote:My thoughts.....
....Since it's spring, the hens should be laying. Two year old birds normally still lay a decent number of eggs although the total output is lower.
....Is the pellet feed for laying chickens? Not any old feed will do, especially with some of the more modern production breeds. A protein boost (meat, cat food, etc) should initiate laying.
.....How long have you had the hens? If the move has been recent, then they may have stopped laying until they adjust well to the new location.
.....If the hens have run of a large area, you may be missing the spot where they are hiding eggs. It's a common enough occurrence. It's happened to me a couple of times.
.....Since the eggs may not be being laid in protected nest boxes, predators may be eating them. In my location, rats, birds, stray dogs, and mongooses steal eggs. No, there are no shell bits left behind most of the time. The eggs simply vanish. One of my friends suspects that a neighbor was stealing her eggs, but trip wire alarms ruled that out. Turned out that it was most likely rats.
.....molting? Hens don't lay eggs if they are molting.
....Chickens do just fine around here in citrus orchards. In fact, my hens readily eat orange pulp. But they won't eat the rinds.
Hope you can sleuth out the answer.