An update from this breedings season. I did not do to well and only four girls produce for me. The girls weight in grams and year born were: 1200 and '07, 1600 and '06, 2500 and '05, and 2500 and '05. The two 2500 gram girls were second year producers. The 1200 gram girl laid four perfect eggs. One of the 2500 gram girls laid eight perfect eggs. The 1600 gram girl laid six eggs, but become egg-bound on the last egg. The other 2500 gram girl laid five eggs, but became egg-bound on the last three eggs. Luckily I was able to get the eggs out of the two females, and they are doing fine now. I have no idea why the two females became egg-bound, but I do not think that it has anything to do with weight or age. They were able to get the other eggs out fine, and one of the girls was 2500 grams, which is way over the suggested breeding weight.