Squirrel repellents include a number of products that prevent squirrels from being attracted to your property. Squirrel repellents are harmless to squirrels, as well as to other animals that may visit your property or eat out of your bird feeders. Commercial pepper sprays can be used on and around the source of the squirrel's temptation which, after many times, can completely deter the squirrel from entering your property. Many squirrel repellers are infused with the smell of coyote or fox urine - the squirrel's natural predators. This type of squirrel repellent preys on the squirrel's instinctive fear of predators; however the urine odor is completely undetectable to humans. Squirrel repellents are known to be 100 percent environmentally safe and harmless to all plants and animals.