Catnip, a plant in the mint family, is officially known as Nepeta Cataria.
Romans used it thousands of years ago for cooking & healing. The first evidence of Catnip in the New World was in 1712 in Massachusetts.
Genetics is a major reason cats react to Catnip. The enticing odor triggers certain nerves within the cat’s brain.
The fresher the Catnip, the more reactive the cat.
Not all cats react the same to Catnip. Some cats roll and rub on the Catnip, loudly purr, eat it, and/or exhibit inebriated behavior; others ignore it altogether!
Catnip is harmless and non-addictive.
Wild cats — lions, leopards, pumas — react the same to Catnip as domestic cats.
Cats can become immune to Catnip — it’s best to dole out Catnip in small doses: remove catnip toys after 10-15 minutes of play-time and reintroduce a week or so later. Perhaps try not to leave catnip out 24/7.