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.
Following are some insights into what your cat is 'saying' with its tail. 1. Tail curves gently down and then up again at the tip. Cat is relaxed and all is well in his world. 2. Tail slightly raised with a soft curve. Something has peaked the cat's interest. 3. Tail is held erect but the tip is tilted over. Cat is in a friendly mood with slight reservations. 4. Tail fully erect with the tip stiffly vertical. This is a wholehearted greeting with no reservations. This is a carry-over from the kitten stage when greeting mom and inviting her to inspect the kitten's rear end.