Egg Eating 😑😑

Hi! I recently added two new chickens to my established flock and the new ones are eating all of the eggs 😠I was hoping they would stop once they settled in but it’s been a little over 3 weeks and they haven’t.

I have oyster shells out in multiple places. One of them sits on the roosting bar and watches the others lay eggs and then hops down to eat the egg as soon as the other hen jumps out of the nesting box 😑

I’ve never had my older ones intentionally eat the eggs. I’ve had one break on accident and they will eat it. I have 7 chickens and I’m getting 1-2 eggs per day if I can run out there and grab the egg before the new ones get to it.

I’ve tried locking the new ones out of the coop before the older ones start laying, but they still eat their own eggs in the run. And I feel bad that my older ones are locked inside all morning.

I’m starting to get pretty frustrated with this. I got the chickens from someone on FB so I don’t think there’s a return policy but any suggestions on how to make them stop??