High altitudes foster larger concentrations of catnip oil resulting in extreme potency. Keep it in the freezer to prolong freshness. Not all cats have the gene which responds to catnip. In fact, about 15% don’t – therefore, those cat’s won’t react to this or any catnip of the market. For those that do, cats will respond with a variety of actions: some will be relaxed, some will be hyper. Regardless of type of behavior, most cats absolutely love and enjoy this fun, playful treat!