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.
Sometimes, the catâs whole body may tremble or shake, and it may inadvertently bite its tongue. One of the first signs of seizures in cats commonly is a distressful and loud meow, with the cat crying out as if it is in pain. The cat may fall over, stare into the distance or jerk uncontrollably.