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There are quite a few opinions regarding using coffee grinds to keep deer out of your garden, with many people convinced of this method. It makes sense that it could work considering deer have a strong sense of smell and likely do not like the smell of coffee grounds. However, there’s no hard evidence supporting the notion that coffee grounds keep deer away, but it may be worth trying.

Squirrels have a strong sense of smell and can be deterred by various scents they dislike. Effective options include peppermint oil, rosemary, garlic, cinnamon, white vinegar, coffee grounds, and predator urine. Squirrels also have a strong aversion to capsaicin, the compound that makes chili peppers hot, making capsaicin-based repellents a good choice for protecting specific areas like gardens or bird feeders. For a DIY solution, you can create a garlic and vinegar spray and apply it daily. Additionally, placing strong-smelling items like certain soaps or dryer sheets near where squirrels frequent can also be effective.

Luckily, skunks aren’t challenging to get rid of. You can try to remove them slowly by filling their den entryway loosely with newspaper. Many skunks notice their den is in jeopardy and take off on their own. You can also try making a homemade spray of jalapeno pepper, yellow onion, and cayenne pepper—believe it or not, skunks are sensitive to these smells, so if you spray this around the den or in hard-to-reach places around your property, most skunks will take the hint and leave. 

While you might want to cut corners by either borrowing or purchasing used live traps for catching rats, this can be dangerous because those traps could contain leftover viruses and bacteria that will enter your home. Always start fresh with new materials to avoid contamination.