But as native and very cute creatures, I have nothing personal against ground squirrels, and so removing them from our property created a conundrum. I did not want to kill them if at all possible, I just wanted them to relocate. But since it's spring, I was afraid the squirrels would be breeding soon, and so I needed a solution sooner rather than later.
Until I filled the holes with used kitty litter.
I am not sure how I came up with this idea, but my general thought is that perhaps the waste product of a predator might cause the squirrels to avoid the holes they'd dug, if I filled them with enough litter. Plus the clumping clay is highly scented, and forms a pretty gooey ball once moisture hits it. And there's no question that when it's been used, it smells pretty bad.
And so I tried it. Within a week the eight holes I had went down to two...then one....and now they are completely gone.
The nicest thing is that I have not harmed the squirrels in any way, just pooped up their home, and redirected them to the unfenced and unowned land across the street to do their squirrely business.
And if they come back, as long as I have an indoor cat, I have a solution.