First of all, yes, I feed the squirrels, and the birds, and enjoy watching them romping around, play, and be stealthy in their little game.
Here lately, with gardening, adding flowers and vegetables throughout the front and back yard, little unwanted critters have been attacking the ground, digging up everything, and just a nuisance in general. I have also come to realize that little mice can finagle a way through a hole the size of a pencil and enter your home. No good. We know mice mulitply rather quickly, so this will also protect your home.
With that said, this is what I have found to keep them away without harming or using chemicals. Peppermint oil, believe it or not. The aroma is too strong for their senses and literally go the other way.
How to: Place a few drops on a cotton ball, throw in your dark cabinets, garage, and various places outdoors to deter critters. If you have a mutilated flower bed, or area they love, it will work to keep them away.
The flip side: Weather can be a factor, of course if it rains, another dose is needed. Also, in your home it may need to be reapplied every 1-2 weeks, but your home will smell nice!
Alternatives: Cayenne pepper (powder) works well in your home, which they also can’t withstand the odor. Fresh Cab will last about 30 days, which is a botanical blend to deter, but can be a little pricey.
I can vouch for Sweeney’s Mole and Gopher Solar Spike, for about $10-$12 bucks you can protect about 7,500 sq ft of yard space by sonic pulses that penetrate underground. I have one in my front yard and noticed a real difference.
Enjoy your space!