Thanks for your reply! My birds are 6 months now, so the eggs are what they are...Oh nice! Well first of all how old are your birds? For the first few weeks they dont lay quite as big eggs. Then they usually get larger.
Then just FYI im not entirely sure about your experience with celadons. If you cross them with your non celadon italians your only going to get non celadon eggs. Then crossing those together you will get 25% celadon eggs. Then from there its a whole process eliminating non celadons and trying to figure out a celadon rooster. Meanwhile I dont think this will make your eggs much bigger. If I were you I would set up some cages for spiral breeding. Then just start selecting the largest eggs and larger birds. USUALLY larger birds lay larger eggs. It might not be a quick process but I think thats the best way to do it besides looking online and finding someone with large celadon egg size averages. But thats kind of cheating . I havent weighed my celadon eggs recently but they are just a tiny bit smaller than my other ones. Ive got two pharaohs that somehow lay 18-19g eggs daily! When I get the chance I am definitely gonna work on those.
Yes, I am aware of the fact that I need two generations to get an Italian celadon hen, if I keep breeding with a pure celadon male... I'm on my first generation now: white male celadon on my Italian hen laying the largest eggs (15g). I'm keeping only females (they are 4 weeks old now), and will then cross them again with the father...
Those 18-19g eggs are worth working on!