Pet CBD oil, like all CBD oil, is made up of cannabinoids found in cannabis. It is also known as cannabidiol and is widely used among people & pets, alike. Cannabis is the genus name for both marijuana and hemp. The term itself is not necessarily interchangeable with marijuana. In fact, almost all pet CBD oil today comes from industrial hemp, which contains very little THC, the cannabinoid responsible for causing a high. Most strains of hemp are rich in CBD & have less than 0.03 percent THC.