Great question, agree with the thread comments. I also have a large, '08 gravid female Pin on her 4th consecutive year. Her weight has progressively increased ... she's now about 3800gms and would predict 12+ eggs this season. (bred to a Butterbee) I think mother nature is the balance, but as breeders, we have the responsibility to monitor weight/growth/health as the key dependencies. I have other girls that have dropped clutches and "lost" weight so as a result would give them another year to recover. But in my case it helps to have to a big arsenal of girls to breed ... hope this helps. Good luck!