If that is the case, you can easily treat them. If you have any horse related business around you - tack or feed shops, etc., you may fine ivermectin there. If no, the Tractor Supply on Route 1 in Scatborough has it:
https://www.tractorsupply.com/tsc/pr...aste-187-608-g
That is in stock and the price is a lot better than the others. They are ALL the same. Just make sure whatever you get is just overmectin - they sometimes add other ingredients and you don't want that.
While you are out, pick up a little bag of pecan halves and if you don't have any, some peanut butter.
For each dose:
Squirt a teeny, tiny bit of the paste out onto a place or something smooth. Using a toothpick or a pin gather a bit of the paste the size of an UNCOOKED grain of rice. If you have rice, use it as a comparison. It is a very small amount. When you have molded your rice grain, gather it with your toothpic and shove it into the wrinkles of the pecan. Place a small smear of peanut butter on top of the pecan where the wormer is. You now have a really awesome squirrel treat that will wipe out mange mites.
Dose is 1 of those treats ever 7-10 days if you possibly can. It doesn't kill eggs, so you need at least one follow up and 3 total over 3 weeks is better.
Cap the ivermectin and hide it in the fridge where nobody will throw it away (or eat it).
You might want to get the affected squirrel used to the idea of you tossing them something good - if they come running to you for treatment instead of you having to hunt them down, it is a lot easier! Start throwing just those guys some walnuts or pecans or something else you know they love. It takes very little time for them to figure out that you have something good!
Try not to double treat anybody. You might want to make a little journal with when you were able to dose each one.