I read that some jurisdictions have laws against using moth balls on squirrels, rabbits, and such.
its not for them to eat. i put them in a container and poke holes through it . Smells awful. Doesnt deter them.
I have tried to kill them with a block rat killer. It might or might not work but doesnt keep a herd away. They chewed through my neighbors underground electrical wires.
THey are a menace.