Not just crops, sweet ingenue:
Over here in New Zealand we've (said without a trace of the self-conscious) been doing great things with (what else?8) sheep and alpha1-antitrypsin1, among other endeavours.
You, the reader, may wish to compare this to nutraceuticals.
1 A low level of this anti-neutrophil elastase for lung tissue, often for genetic reasons, is a cause of emphysema.