Hellbender and Minniechickmama, is this true about being eggbound due to large eggs of the Cornish that are more hatchery type too? Or just the extreme exhibition Cornish? Mine seem to be in between. I have a copy of Hogarth's Call of the Hen, what is the limiting factor of the hen's capacity that would make a hen prone to being egg bound? I've read and re read the book a few times, but I haven't applied it to my hens (except for a few- I understand the distance between the pelvic bones part and how the vent looks, but they have only just started laying so it's probably too early to do a good assessment, right?) The hatching eggs I got my cornish from were in the 52-55 gram range, would selecting for 5 more grams be excessive, do you think? Embarrassingly I'm not exactly sure yet which ones of my eggs are coming from the Buckeyes. The Buckeye hatching eggs I got were very long, but I'm not seeing any eggs like that.
The Cornish shell quality was superb, and that's a feature I'd like in my project birds. Hence the first cross will be buckeye (for temperament and all around good chicken-ness, to cornish, for their smarts and egg quality, but these offspring will be crossed again to Anconas. This is just for fun- my pea combed white- eggshell layer project.