Yes the smell of catnip will always be on the toys unless you chemical
bleach them.  And I heard of catnip causing a cat to urinate catnip  here is
how to think of a cat they are each unique just like humans  they will all
react differently
I grow my own  catnip it grows like a weed ought to see cats with fresh
catnip

Archive-name: cats-faq/misc
URL: http://www.fanciers.com/cat-faqs/misc.html
Last-modified: 13 Aug 1999

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                          Miscellaneous Information

  Note: Please see the [1]Table of Contents FAQ for a complete list of
  topics.
    _________________________________________________________________

Author

  Originally written 1991 & updated through 1997 by Cindy Tittle Moore.
  Maintained by the Fanciers website as of July 1999.
    _________________________________________________________________
Catnip and Valerian.

  Catnip is a plant that causes various reactions in cats. Very young
  cats and kittens will not be affected by catnip. About 20% of cats are
  never affected by catnip. It is not known why or how catnip has the
  effect it does on the rest of the cat population. It is a
  non-addictive "recreational drug" for cats with no known harm to the
  cat. There was an article in Science [exact reference?] on the
  neurological effects of catnip on cats. It seems to stimulate the same
  pleasure centers in the feline brain that orgasm does. Most cats
  "mellow out" and become sleepy and happy, others start acting very
  kittenish. A small percentage will become possessive of their catnip
  and may snap or hiss at you.

  You can find wild catnip plants in most weedy areas, and harvest the
  seed. Or you can buy seed from companies like Burpees or Parks or
  Northrup King -- most garden centers have catnip seed this time of
  year -- check the "herb" section. Or even seed racks in the grocery
  and discount stores.

  Catnip is easy to grow. You will need to keep the plant itself out of
  the reach of the cats as catnip-lovers will quickly destroy it. The
  best strategy is to get some growing, and then pinch and prune it
  regularly and give the harvested leaves to your cat. Keep it in its
  own pot, as it will spread rapidly. Cats will tend to dig up
  transplanted catnip and eat it roots and all, but are much gentler on
  plants started from seed. The leaves have to be bruised to release the
  odor, and transplanting seems to be enough bruising...

  Nepeta cataria is the common catnip; other Nepeta species have varying
  amounts of "active ingredient". A good one is Nepeta mussini, a
  miniature-leaved catnip that makes a good rockgarden plant. Nepeta is
  a genus of the Lamiaceae (=Labiatae), the mint family. There are about
  250 species of catnip, plus a bunch of hybrids between species. Only
  about 10 are available in this country, though.

  You can order seeds from Burpee (215-674-9633)
  Nepeta cataria B61424 $1.25; N. mussinii B38828 $1.45

  Valerian root is an herb with effects very similar to catnip and
  generally makes cats a bit nuts. It is however not as readily
  available as catnip and perhaps a bit more potent than catnip.

  Catnip and Valerian both act as sedatives on humans.
    _________________________________________________________________