There are a number of squirrel repellents available (including fior ground squirrels) - googling brings up a number of choices, including coyote or fox urine and cayenne, white, black and chili pepper. If one or more work, any risk of pets or other unintended victims turning into rocks or...
Not to spoil the party, but to those of you with designs on squirrels and other beings that are not chicken preds (happen to like squirrels myself..), you may well end up killing or making very sick unintended victims, including your pets or someone elses. Consider repellents.
JJ
p.s. Someone...