I have been doing a lot of reading on different sites and it seems that "giant " mealworms are treated with a growth hormone to keep them from puapating.... If that is true, wouldn't they be a bad choice to give quail?? You are what you eat.
Your birds are what they eat, so if something they eat has growth hormones in it, it will wind up in your birds. I'm not really a huge fan of feeding any meal worms to "coturnix", so my answer is YES. Giant meal worms could be bad for quail.
If you are interested in starting a breeding colony of meal worms, then you should defiantly avoid the giant ones!
24-30% COMPLETE GBS will kick the living poop, out of a bucket of meal worms! If you can find that, then you are doing fine