I have a mixed bunch of 17 week olds in a coop. Barred rocks, white rocks, silver laced and gold laced wyandottes, and easter eggers. Over the last couple days, I have found 2 small, but complete eggs, and this morning, I found 1 small complete egg and 2 small eggs with very soft shells. I am wondering which onesw are the most likely to be laying these. Any ideas?