One of our hens, a Barnevelder, has been laying eggs almost every day for the past few weeks. Today we got an egg that looks different. It's lighter an much more spotty (some of her eggs have been a little spotty but not this much). As far as we're aware, our Plymouth Rock hasn't laid any eggs yet, but she should be old enough to start now. Do you think this one could possibly be hers instead?
Here's the new egg:
Here's a couple that are definitely the Barnevelder's.
And just for comparison: