Greetings peeps! Can't wait for spring to arrive!
All smooth sailing with my new flock, which is now 10 months. But today, my EE laid THIS! They are fixed in place, part of the shell. Is it calcium? They are actually the shape of tiny eggs, so I feared a critter in her system, but I cut a few in half and they're all just very hard shell. No bad symptoms, just... this! Any ideas?

Close-up:

All smooth sailing with my new flock, which is now 10 months. But today, my EE laid THIS! They are fixed in place, part of the shell. Is it calcium? They are actually the shape of tiny eggs, so I feared a critter in her system, but I cut a few in half and they're all just very hard shell. No bad symptoms, just... this! Any ideas?
Close-up: