Suddenly weird eggs

[jsd54]

For the last three days I've been getting one enormous, huge, double-yolked egg. I don't know who's laying it; I have Comets, Buff Orps, and Ameracaunas. They're all about 18 months old and have been laying nicely for a year. This sudden change in one hen has me worried. Any ideas? Thanks!

 

[ramirezframing]

some lay doubles a few times, some lay alot of doubles, some will never lay a double

 

[jsd54]

I get double-yolked eggs frequently, but not like these. These eggs are not just large; they look like ostrich eggs. They are way larger than anything my hens have ever laid before, even the Orps. It's the sudden change in size that has me concerned. Everyone looks and acts healthy. (I've got 20 hens.)

I'll try to post pictures later.