True. Of course, that depends a lot on how many you have. The first two quail that I hatched were 5 days apart, but by the second day you could barely tell the difference between them. The last batch of 7 that hatched were born within hours of each other, but the youngest ones are still about half the size of the oldest one, I guess just because of that slight head start. Mine don't pick on each other, though, not after the first day or two. Interestingly, I put the eggs in all on different days, but they all decided to hatch on the same day. I wonder if hearing the others hatched just triggered something in them...