It can happen not to all cats i just said mine have fun as well. Just trying to be helpful, its the truth. I have no idea when it comes to it being posinous and im glad your nice with your cat though.
My gf groww catnip and catgrass, Im teaching her to transplant with it so I can use her as my foliage bitch! Haha, Im growing some outdoors i have inside right now. Hopefully it gets huge.