Marijuana, the most often used illegal drug in this country, is a product of the hemp plant, Cannabis sativa. The main active chemical in marijuana, also present in other forms of cannabis, is THC (delta-9-tetrahydrocannabinol). Of the roughly 400 chemicals found in the cannabis plant, THC affects the brain the most.
Cats 'vibrate' when marking territory-spayed cats can also 'dry' spray. Spayed male cats urine doesn't smell. They swish their tales as a sign of annoyance or anger. If the tip of the tail 'trembles', it's quite often a sign of being 'unsure' about something. Source(s): Cat owner.
Cats dig at their ears when their ears itch. Head shaking is another sign of itchy ears. Any time a cat really digs into her ears, I become concerned about the risk of an ear infection, ear mites, or a foreign object (such as a foxtail) in the ear. If your vet has checked the ears recently and given them a clean bill of health, then these issues shouldnât be playing a role in the scratching and shaking.