Humans and apes share a close genetic heritage. This may be the reason why zoopharmacognosy research has mostly concentrated on them, as it can then be more easily transferred to humans. As chimpanzees are also known to participate in comparable behaviors, orangutans are not the only primates who self-medicate.
Being intelligent animals, it shouldn’t be surprising that chimpanzees can treat their own illnesses. They consume the same bitter pith in Africa that locals use to prevent worm infections. Although it is uncertain which species originally made use of the plant, it is evident that they are both capable of self-medicating.
Animal self-medication is frequently influenced by parasitic illnesses. Sheep are an example of this. When given the freedom to choose, people will eat things that will keep them healthy and free from disease.
Although a shepherd normally watches over the sheep, there are several natural habits that the animals have that should not be disturbed. They consume meals high in tannins when parasite-infected in order to eradicate the invaders. There is also some evidence that suggests the young may inherit this feature. Lambs also consumed diets high in tannin, indicating that they recognized it would help avoid illness. Although sheep are not noted for their intellect, they do exhibit enough foresight to look after their own health.