I've been having problems with gophers too. I might end up trying those pellets. I have been afraid the cats would eat the poisoned gophers and die too and then I would end up with a bird problem.
A kid that lives on the farm in back likes to trap gophers and he trapped one out for me. I'll have to wait and see if more show up. They are the biggest pain and I have tunnels in my lawn and all over.