I am not entirely sure that I am right about this, but I think that with a lesser to lesser breeding each egg has a 25% chance of hatching out a BEL (if I said that right). At the same time I think each egg also has a 25% chance of being a normal, and a 50% chance of being a lesser. That means over a long period of time you might expect one out of every four babies form such pairings to be a BEL... I think....

Someone else feel free to correct me if I am wrong or if I worded it wrong.