We've experimented with tons of various fake mice, from the colorful fake looking ones to the more realistic ones, and even the ones covered in rabbit fur.
It seems most all of them come laced with catnip, but I think there must be various types of catnip because some of the toys make our cats go absoultely crazy in a NOT so good way. Then there are some that seem to have almost no affect.
But these... KONG Cat Naturals - Natural Mice... these are the perfect balance for our cats!
Like one of the reviewers before me, I was not impressed when I first opened the package and threw the mice down for the cats to play. And at first, it seemed like they weren't exactly impressed either. But within an hour these became their FAVORITE toys AND without making them "crazy". Obsessed and playful with them, but not acting all wierd and flipping out like some catnips do.
Now after having them for almost 2 weeks, out of all the toys they have, they *consistently* want to play with these and we have a regular routine of "fetch" going. These things have my cats acting like dogs. They constantly bring them to us and practically beg to have us play fetch with them. The cats will continue to chase these mice up the stairs when we throw them, and bring them back down to us over and over for as long as we'll keep it up!
Awesome. Never buying any little fake mice other than these again.