Tom that is very true.Nature helps us here on the mishaped eggs as they do not often hatch,but if you have that kind,just do not set those eggs,so culling the culprit either way by not letting her reproduce. Back when I had Buff Leghorn bantams,some of the original birds layed long thin (elongated bullet) eggs.They would not hatch,looked awful and I hated them.After a few years of not setting that kind they started to improve,must have been some recessive genes at work as they would reappear,but I did not give in to it and it became much less of a problem. I have heard that birds that recover from (Mareks I believe)can lay mishapen eggs and or will not lay at all as hens. I will agree that a dozen of extra large white eggs of the proper shape can be attractive/impressive.I saw seen some eggs that were from a large fowl flock of Leghorn hens,the breeder obviously did not care about egg size as the eggs were so tiny they could have passed for bantam,well below small (pee wee).That would have been a case for some serious selection for size. It good to know it is very possible to do and worth the effort.Now if every bird lays a tiny egg,you might have to outcross to get some variation to appear.With almost all traits you need some flock numbers in order to allow different grades and quality to appear,giving selection and culling, a chance to work for you.