Many people know that catnip can create a euphoric and playful feelings in many cats, but other cats don’t seem to be affected. There are actually several other plants that could create this same effect, especially one called silver vine, which is in the kiwi family. Interestingly, a recent study shows that more cats reacted to silver vine than to catnip, and moreover, almost 75 percent of the catnip non-responders responded to silver vine. If your cat hasn’t enjoyed catnip, or even if he loves catnip, you should really give