oh , it sure does! all but Cassie, she just ignores it and the other 6 go crazy for it! the day I brought Cookie home, I gave some to Muffin, and Cookie, but Cookie just played with it... and when Charlie and Patches were kittens same thing, they batted it around, didn't know what to do with it... then one day, wow! they love it! Cookie once thumped Muffin on the head because Muffin got too close to HER catnip!
when Patches sees the bag and I shake it, he knows what it is and he head-butts my hand! he says mmm give me that! and he is in heaven with it! I have to be sure to put it away, or muffin will tear into the bag and so will Patches!

"My cats love it but, I had to take it away. One of my cats started peeing on it all the time. " did you ask the vet about why? how often did you give it to them?