WHEN it comes to furkids, it should be no surprise that many will spend a fair chunk of change on toys and treats for their cats and dogs.

These include vitamin C, vitamin E, magnesium, flavonoids, and more. How Does Catnip Affect Dogs? Not all cats end up bouncing off the walls when they catch a whiff of catnip.

Dogs are nearly as crazy for anise seed as cats are for catnip. Anise is a plant that’s sometimes known as fennel (although technically fennel is a different plant) and put in absinthe.

Because some cats don't have the genes to detect nepetalactone, the intoxicating substance in catnip, Siacusa says. Catnip, also called catmint, has an intoxicating effect on many felines.