This is what I look for. See how the disc is tight and you can clearly see the definition of the bullseye? This is what I see in all of my eggs. I don't feed Purina so I'm not sure as to the ingredients in there. I know plenty of people use it, so no idea if that might be the problem on your area. Is it possible that your male just can't reach the mark since he does have English Orpington blood and the increased feathering that happens with that?
