James wrote:
There are many holes in my garden and I wonder if using rat poison
would get rid of the little pests.

as others have said, if you put it above ground you will be making a
mess. I used to be overrun and I would put it in the tunnels, digging a
hole with my finger, pouring the stuff, and closing it.

then I discovered that predator urine keeps them away. I have not seen
one in years.