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The best deterrents for possums include securing trash cans with tight-fitting lids, removing outdoor food sources like pet food or fallen fruit, and trimming tree branches that provide access to your roof or an open window. Motion-activated lights or sprinklers can also startle and discourage them from visiting. Additionally, you can take advantage of their strong sense of smell by using garlic, onion, or commercial possum repellents to keep them off your property.

Some snake repellents are risky to use around people and pets because they use the active ingredient in mothballs, naphthalene. The United States Environmental Protection Agency (EPA) has classified naphthalene as a carcinogen that can cause damage to the liver, neurological issues, and cataracts. 

The Colorado State University Extension suggests there’s not enough conclusive evidence of the effectiveness of snake repellents to recommend their use.

If a foxtail enters your pet’s body and is left untreated, it can cause a serious infection and, in some cases, travel internally to their organs and threaten their life. That’s why it’s essential to check your pet’s fur for signs of foxtails and visit the veterinarian for removal as quickly as possible. If foxtail is treated quickly, they are relatively easy for a professional vet to remove safely.

If you discover a dead animal in your air ducts, address the issue promptly to prevent unpleasant odors and potential health hazards. Turn off your HVAC system to prevent further spread of contaminants and contact a professional HVAC technician or pest control specialist to remove the animal and clean the affected area. They have the tools and expertise to handle the situation, including removing and disinfecting contaminated ductwork. The technician will inspect the ducts for any damage or other issues that might have allowed the animal to enter.