Any chicken can potentially pop out an odd shaped egg. I've had some very long eggs, and some that were almost as round as a golf ball. Sometimes they even had lumpy ridges in them (not soft-shelled, just lumpy). And a coupe days ago, I had a HUGE double-yolker pop out.
It would help to know what breeds or mixes of breeds you have.
I have LF brahmas. Several of my hens lay pinkish eggs and from one hen I regularly get eggs shaped like that. We call them pullet bullets.