Foraging animals such as chickens and hamsters don't always get the optimal nutrients from their food in the wild.
As I said I beg to differ, the ones that thrive and live long lives in the wild are in fact getting a balanced nutritionally complete diets as they forage... On the other hand the ones that don't get sufficient nutrition, simply don't thrive, are not as healthy, and live shorter lives due to the lack of a proper diet... At the end of the day diet and health are closely tied together...
I simply will not support the excuse that some don't get balanced nutrition in the wild as a valid reason to not provide proper and balanced nutrition in captivity...