Catnip may also have other properties that attract it to cats, according to Science Focus. Researchers in Japan and the UK found that the herb may even protect them from mosquitos and other parasites. They discovered this by introducing mosquitos into an environment where cats were given the option to rub themselves on nepetalactone-soaked paper. The research team observed that the cats who chose to do so were less likely to be attacked by the bugs than those felines who opted not to cover themselves in catnip.
As for why some of the cats chose not to rub this paper on their fur, it's because not all cats are fond of catnip. As Pet MD notes, studies have found that around 60% of cats react positively to the herb, and oftentimes their preference can be linked to a dominant trait in their genetic code.
For cats that aren't a fan of catnip, Silvervine can be used as a more potent alternative. Per Meowbox, this herb is widely used in Japan and China as it contains two attractants — nepetalactone and the additional actinide (via Pretty Litter).
