Research overview: heritability and prevalence of the catnip response

Not all cats respond to catnip, and the trait appears to be inherited. This overview surveys evidence that responsiveness to catnip is governed by genetics, with roughly two-thirds of cats showing the reaction and the remainder indifferent, and that the response also depends on age. Kittens and very young cats typically do not react, with sensitivity emerging as they mature. The survey relates this prevalence to early breeding studies suggesting a heritable basis and to the practical point that silver vine can reach many catnip-nonresponders. It frames individual variation as a normal feature of the trait rather than a defect. Understanding the prevalence and heritability of the catnip response explains why some cats ignore catnip entirely and connects the behavior to genetics and development. It also guides enrichment, since knowing a cat's responsiveness helps caretakers choose effective botanicals for stimulation.