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Some suggest mothballs as a deterrent for iguanas, but they are ineffective and harmful. Mothballs contain chemicals like naphthalene or paradichlorobenzene, which are toxic to humans and animals, including iguanas. The fumes can cause respiratory problems, skin irritation, and other health issues. Moreover, using mothballs outdoors is not recommended, as they contaminate soil and water sources.

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.

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. 

To keep deer from eating your trees, you can either put up barriers or install a deer repellant. Barriers that protect trees from deer include tree wrap or fencing. You can also plant deer-resistant trees to prevent deer from eating or scraping against your trees or garden with plants that deer don’t like to be around.