ediblelandscapingsc said:So its kitty opium 
I'm very interested in receiving or buying some of those plants/cuttings/fruits! Can you email me please?
The thing cats love most are the fruit galls. These are induced by a gall midge (P. matatabi), that doesn't exist in the USA, so we'll not be able to get fruit galls. Cats may have a mild response to other parts of the plant, although this has not been confirmed yet.
Maybe this is of interest to you:
Google: "bol caspers bmc vet research" and you'll find a paper published about cats and silver vine. Especially the discussion section contains some fun information.
