Like Ed said.... they work well on birds. I've used them many times on starlings and they knocked the yellow beaks down hard and cleanly, plus you get to hear that loud "smack" sound

As for small game....... I agree with Ed here as well.... I wouldn't opt to use them for small game hunting...
I'm not saying that a well placed head shot at reasonable distance wouldn't take down a squirrel or rabbit,, it might,,, but I'd rather use a good domed pellet or a predator..
Jeff