Why do my Quail babies keep dying? UPDATED WITH PICS!

[BjsBestGirl]

We have 30 left. 7 fatties (big brown), 5 red ones, 5 silver, and 13 mini's-yellow with white wings. Are any of them rare or are they all common?

 

[JJMR794]

From what i see...

red= tuxedo coturnix, likely rosetta tuxedo
fatty and all like him are brown coturnix
mini is likely a white button
silver is likely golden coturnix
the tiny ones may be runt coturnix or buttons
the white with spots are english white coturnix unless mini...