hope it works. For mine it certainly wouldn't! They are masters at going around, over, and through pretty much anything to get at what they want. I am trying something new this year. It's a relatively new plant called (no kidding!) the "Piss Off" plant. (Plectranthus 'Sumcol 01' for those of you into botanical language!) Says cats and dogs won't go near it (it says). Completely non-toxic but with a scent that apparently cats and dogs cannot tolerate (though not 'particularly offensive' to humans. It was developed in Europe as an ornamental so you folks might already know of it. As for it working.... I'll believe it when I see it.