Does having a rooster decrease the size of eggs? My hens all seem to be laying fairly small eggs. My sister in law has a flock with pretty much the same breeds as me, same age, same feed/feeding regimen, on same property about 100 yards apart. The gesso from her flock are not only more plentiful but much larger. The only difference is that I have a rooster and she doesn't. Any ideas or suggestions would be great.