Oddly enough, he starts catching the things just when we bought our cure:
Yup, JuicyFruit. We tried the sonic spikes. They didn't do a darn thing. Really, I'd prefer not to kill the things, but they're totally worsening our already sorry excuse for a lawn and we ARE trying to not have the worst lawn in the neighborhood (no small task, given the majority of the neighborhood are retirees who spend a LOT of time in the yard!) We can't use poison without fear of the dogs digging it up, so gum it is. Apparently the gophers (and moles!) will eat the gum but they can't digest it, and akin to feeding seagulls alka-seltzer, they die from it (sans the belly explosion, I assume). Aaah, the joys of owning your own home, right?!