It might work, but I know for a fact that high velocity HPS and #6 shOT also work well. I did feel a bit ashamed that since I had let them live and hatch out 10 kittens I then felt obligated to feed, care for and find homes for the dang things, two of them are still here, and a 3rd died a couple weeks ago. All I could think of was, well there was a $100 plus vet bill for spaying and shots wasted.