My brown corturnix quail are now 16 weeks old. I'm getting a steady supply of 7 eggs per day and have been for several weeks. But I still have 2 that are not laying. I have automatic lighting that comes on at 3 am. I feed them high protein game bird as well as oyster shell. I walk by every day and tell them if they don't start laying they are gonna get eaten. Even with all this positive reinforment, still no egg out of these 2. Any clue what's up, or should I just go ahead and butcher them?