Hi Sharon, I hope this helps! https://www.terminix.com/pest-control/squirrels/removal/squirrels-in-the-yard/
Those are good suggestions from Grandma, in all practicality, it is near impossible. Best to you.
Here is an idea that may help
It's hard to get rid of squirrels, but if you have oak trees that you don't like in your yard, you could try cutting them down. If you don't have oak trees, you'll have a lot fewer squirrels.
I don't know about trees, but you can keep them off bird feeders by spreading Valenline on the branches. They slide off.
Your neighbors may find them adorable and be feeding them.
I have counted 8 in the 2 blue spruce trees in my front yard. I have tried repellant around the trees but I think the squirrels are snacking on it.
Rat bait cubes, put in the trees or in places where pets can’t get to them.