I have 2 ee pullets that recently started laying at 17 weeks old, 1 seems to have a few chinks in her production line at 1st she was laying an egg and a soft egg now she seems to be laying double yolks every egg they started laying regular eggs 10 days ago, I've opened 5 healthy double yolks and 1 soft 1, that doesn't include the ones I gave away. how long does anyone think she'll keep this up?