I have never seen an egg like this one on the left. The one on the right is a standard, large egg laid by one of our ISA Brown chickens. The one on the left seems intact, but looks all cracked and leathery, plus it’s huge! Yesterday someone seems to have laid an egg with no shell (it looked like someone just cracked an egg into the nest box, there was no evidence of broken shells or remnants or anything). Today someone has laid mutant egg! Do any of you with more experience know what this is? These are 2-year-old birds, not new layers.