Good eye. We have two Easter eggers but one of them lays very thin shelled eggs that seldom survive. And the other one isn't much better.
Aw, shame. I've found feeding mine eggshells helps their shells thicken, but I don't know how much that would help yours. Tell them I said hello!
I didn't know cats could lay so many eggs !
Do a stool sample for parasites and you will find all kinds of eggs coming from cats.