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Zootrophic, adj.:
(physiology) Of or pertaining to the nourishment of animals.
Etymology:
zoo, from Ancient Greek ζῷον (zôion, “animal”) + trophic, from Ancient Greek τροφικός (trophikós, “pertaining to food or nourishment”), from τροφή (trophḗ, “food”).
(thanks to
duathir for pointing me to this word!) 