Commercial squirrel repellents depend on scents and flavors repugnant to the pests. You can create your own homemade repellent using a similar method from nontoxic items in the.
Homemade Squirrel Repellent: Keeping Squirrels Out Naturally and Safely - Microabode
Squirrel Repellent for my mom's yard.squirrel repellent: cups filled with mothballs and cayenne pepper
If you have a vegetable garden, you will be aware of how fast a squirrel can destroy it. These natural squirrel repellent ideas may be just what you need.