Let me just say this. I am a cat lover, big time. But they don't have the right to destroy my stuff. So when they killed seedling trees by sharpening their claws on them I responded by mixing a generous amount of crushed red pepper with Tanglefoot (a gummy substance that you put on a tree trunk that keeps insects from climbing up to the canopy). Then I smeared the mixture all around the trunk at scratching height. Voila--end of problem. Yes, it stung their mouths when they tried to lick it off and no, I didn't care. In fact, I admit, I took a certain revengeful pleasure in it. After all it doesn't really hurt the cats and it's a good negative reinforcement. Kay (leave my plants alone!!!) Buie