Squirrels... ugh.

*crossing my fingers* I understand that squirrels (hopefully) are not interested in chickens. However, my fear are the holes...

Therefore, how the heck do you tell/make these squirrels STAY AWAY?

During my coop/run construction, I do have a surrounding hardware cloth netting and island that reaches vertically and horizontally about 14-18 inches (I guess I should of have made it longer... #regrets). I have been plugging the holes with cement blocks... pouring cement (+refilling with soil/mulch/etc) to cause some blockage but of course they start making new holes/digging around it. I have a dual electric fence surrounding the coop/run. I keep everything clean and all day food exposure at a minimum. I am at a lost for words...

Any helpful tips and advice will be greatly appreciated! Thank you so much in advance!