Goats know. Sheep know. Equines know. If I make sure the farm animals have access to different flora around the pastures they won’t get ill. It’s nice following the animals around and finding out what they eat, and other ways they use plants. The more time I spend with animals the more I think it’s us humans being the dumb ones.
On that note, watching what great apes do in their natural habitat might teach us a few things about plants.