Thanks, I am sure it is a mix of all these things that have caused the decrease. I will do that with the chick starter. I do feed them dried mealworms as a treat. This is my first experience with alot of this stuff. I have only had chickens about 7 or 8 months now. Thanks for the advice. I also have some rooster booster that goes in the water. I will start mixing in some of that was well.Ok. First, oyster shells and grit are not something they eat regularly... once in a blue moon, so to speak. Put it this way... in all these years I have had chickens I have had to give oyster shells maybe twice. I only give them if the shells get thin.
Now, as for laying... you got everything going against you. Too much scratch, tomatoes, then they are moulting.... all these things lead to lower egg rates. I, personally, would stop the scratch in the feed. You'd save alot of money. They just toss the feed out and look for the goodies in the mix. I feed mine a scoop of scratch per 10 birds or so every other day... on the ground, not in their feeder. It's a treat, not a staple in their diet.
For their moult, you should amp up the protien in their diet. Maybe mix chick starter in with the layer feed... or you can feed scrambled eggs or browned beef. I have never done either of those... just doesn't sit well with me for some reason. I usually give crickets or mealworms out more durring moults and also add "nutri-drench" to their water... "kickin chicken" would be my second choice. But the point is to help them with their next set of feathers. As they come out of moult, egg production should pick right up again.