Its always nice when they decide to quit being moochers!
I know that my b.Cochin eggs had just a slightly smaller yolk (not much), but they usually didn't have as much white as the others.
The smaller light brown in the middle looks like a b.Cochin egg.....
Here are a bunch of cochin eggs, next to B.Orpington eggs which are a little bit larger than my comet eggs..... (unfortunately, all these hens were predator losses)