In my opinion coturnix shouldn't be gaining weight between 12 and 14 weeks of age. By 12 weeks they are fully-grown, so any weight added after that point is just fat. So the birds might be 16 oz. but it's fat, not genetics.
Some people do have coturnix that are genetically reaching up to 1 pound, I've seen pictures on here. True, the birds in the pic are very large, but I'd not want to get 1 lb.'ers by overfeeding them.
Some people do have coturnix that are genetically reaching up to 1 pound, I've seen pictures on here. True, the birds in the pic are very large, but I'd not want to get 1 lb.'ers by overfeeding them.