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Squirrels hate not having access to secure shelter or food sources. Your best line of defense is to make your property less attractive by removing access to these things. There are chemical squirrel repellents, but these have mixed success. According to Pennsylvania State University, you can apply products containing the bittering agent denatonium saccharide to a squirrel's favorite fence, tree, or roof spots. However, you need to reapply repellents regularly, which aren’t scientifically proven effective.

Possums are not aggressive toward people or pets. They are shy critters that prefer to avoid confrontations. When threatened, they may hiss, growl, or display their teeth but are more likely to play dead as a defense mechanism. Possums rarely attack unless cornered or provoked. They are not a significant threat to pets, though a curious dog or cat might provoke a defensive reaction.

When it comes to where raccoons nest, they can establish a home pretty anywhere. They may make their homes in crawl spaces, attics, and chimneys. Barn lofts, haystacks, and even storm sewers can double as raccoon dens. Also, they are known for setting up multiple dwellings for their use.

Armadillos have very strong smelling capabilities to track down insects efficiently. But this superpower is actually a double-edged sword because their extreme sense of smell also causes them to be more sensitive and deterred by strong odors. To keep them at bay, you can place small amounts of substances like vinegar, ammonia, and mothballs around your property and near armadillo hotspots.

Although you can technically flood an armadillo out of its hole, it’s important to remember that this can be potentially fatal to the animal. Armadillos sleep between 16 and 18 hours a day, and if you perform this technique while they’re deep in sleep, they may not awake soon enough to save themselves.