My troublesome little tuxedo golden button girl, Buzz, hasn't laid for a while while we did some household rearrangement. The new setup for the four single quail girls includes a light fixture, and one of my other girls, Joan, has started laying HUGE perfect eggs. Buzz laid a soft-shell yesterday and she and the girls had a grand time breaking it and spreading yolky mess all over everything. Today she's laid an egg again and it's not a soft shell but it is all white and very thin. She and Joan have the same diet: 25% protein feed, high quality seed, daily fresh greens and other veggies, bugs twice a week, and unlimited access to crushed oyster shell. Joan's eggs are massive and perfectly formed every day. Buzz's are small, weak- or soft-shelled, and she'll often skip days between laying. My quail are about nine or ten weeks old, and the other two girls in the pen with Buzz and Joan haven't started laying yet but i think they might soon. What's wrong with Little Buzz and what can i do to get her laying normal eggs?