I have a 3 yr oLd RIR hen that lays egg anywhere from 75g to almost 90g eggs she has just finished her molt and Laying in upper 80 grams. I got her from ideal poultry along with 5 other hens and 2 roosters. The others do lay smaller eggs averaging mid 70 grams. She does have one other sister that will lay one in the lower 80s once and a while I have a small scale breeding pin I put her and her sister in with one of the roosters I also got from ideal at the same time. I set 10 eggs. Hatched 8 of the 10. Out of the 8 I had 3 with bad leg deformities. Out of the remaining 5 I only got 3 hens. Now that those hen are almost 1 year old next month, they have yet to lay anything more than a upper 60 gram egg. And something else is there egg color is a really nice looking dark brown. I was always told (by my grandmother) that the hen would pass on the egg size and production to the next generation. And the rooster would pass on egg color and we'll as vigor. And as a young laid I watched her use this systems with great success. So.... has anyone else have any enlightenment HOW THE HECK DOES THIS STUFF WORK!!! Only thing I can come with is she must have been a breed that Is closer a heritage breed?