Year after year predators who eat mice build up poison in their bodies from eating them. Now a new wrinkle has appeared. The rodents of the world are becoming resistant to common chemicals, which allows them to carry larger toxic loads in their bodies, which is forcing people to invent even meaner chemicals to kill the rodents which the hawks, owls and pussycats eat. If you or someone you know has rodent problems get snap traps and a cat named Jenny. How about moles.
People hate moles because they make our lawns lumpy.
So people poison moles. If you know someone being traumatized by mole hills, get them mole traps. Yes, you do have to dispose of the bodies, but that's life. Life is icky at times. Put up as many bird feeders and bird houses as you can handle.