If your dog just attacked a possum, your first priority is checking your dog for wounds, then dealing with the possum. Most dogs come away from these encounters with only minor scratches or puncture wounds, but even small bites can lead to serious infections if left untreated. Here’s what to do, step by step.
Check Your Dog for Injuries
Separate your dog from the possum right away. Bring your dog inside or to a well-lit area and run your hands over their entire body, especially the face, neck, chest, and legs. Puncture wounds from possum teeth are small and easy to miss under fur, so feel for any wet spots, swelling, or areas where your dog flinches.
Some injuries need emergency veterinary care. Get to a vet immediately if you see:
- Bleeding that won’t stop with gentle pressure
- Deep or large wounds, especially on the abdomen
- Multiple bite wounds or punctures
- Sudden weakness or collapse
For minor scratches or shallow puncture wounds, you can do initial cleaning at home. Use plain saline solution (the same kind sold for wound irrigation or contact lenses) or clean running water to flush the wound thoroughly. If you have dilute chlorhexidine (0.05%), that’s the best antiseptic option because it fights a broad range of bacteria without damaging healing tissue. Avoid hydrogen peroxide, which is toxic to healthy tissue and can slow healing. Skip surgical scrubs or strong antiseptics for the same reason. Gently flush the wound with moderate pressure, enough to wash out debris but not so forceful that you push bacteria deeper. A clean squeeze bottle works well.
Even if a wound looks minor after cleaning, call your vet. Puncture wounds seal over quickly on the surface while trapping bacteria underneath, which is a recipe for abscess formation.
Watch for Signs of Infection
Wound infections from animal bites typically show up within two to three days. Check the wound site at least twice daily and look for increasing redness that spreads outward from the wound, swelling, warmth to the touch, or any discharge (especially yellow or green). Your dog may also lick or guard the area obsessively if it’s becoming painful.
Cellulitis, a bacterial skin infection, is one of the more common complications. It causes tenderness, redness, and visible swelling around the bite. If you notice any of these changes, don’t wait for them to resolve on their own. Bite wound infections worsen quickly and often require antibiotics.
Rabies Risk Is Low but Not Zero
Possums (Virginia opossums, the species found across North America) are one of the least likely mammals to carry rabies. Their body temperature runs unusually low for a mammal, between 94 and 97°F, and the rabies virus doesn’t thrive at those temperatures. Experimental studies dating back to the 1960s suggested opossums are resistant to rabies infection, and confirmed cases remain extremely rare.
That said, “extremely rare” is not “impossible.” If your dog’s rabies vaccination is current, the CDC recommends an immediate booster shot after any wildlife exposure. If your dog is overdue on their rabies vaccine, the situation is assessed case by case, but a booster is still generally given. Call your vet and let them know about the encounter so they can advise you on timing. Bring your dog’s vaccination records if you have them.
Other Diseases Possums Can Carry
Rabies gets the most attention, but other infections are actually a bigger concern with possums. Leptospirosis is the main one. Dogs contract it through contact with urine from infected animals, and possums are known carriers. The bacteria can enter through broken skin, mucous membranes, or if your dog licked or mouthed the possum.
Leptospirosis symptoms usually appear within one to two weeks and include fever, lethargy, loss of appetite, joint or muscle pain, and eye or nasal discharge. As the disease progresses, dogs may start vomiting, become dehydrated, and develop back pain from kidney failure. Yellowing of the eyes or skin (jaundice) is another warning sign. Leptospirosis is treatable when caught early but can be fatal if it isn’t, so mention the possum encounter to your vet even if your dog seems fine. There is a vaccine for leptospirosis, and if your dog doesn’t already receive it, this is a good reason to discuss adding it.
Possums also carry various parasites, including fleas, ticks, and intestinal parasites that your dog could pick up from the encounter. Make sure your dog is current on flea and tick prevention, and watch for any digestive changes over the following weeks.
Check Whether the Possum Is Actually Dead
Possums are famous for “playing dead,” and the act is convincing. When threatened, their bodies enter an involuntary state called thanatosis. They go limp, their eyes glaze over, and they can even appear to have rigor mortis. This state can last anywhere from a few minutes to over an hour.
The simplest way to tell the difference: look at the nose. A pink nose means the possum is alive, even if it appears completely lifeless. A white nose means it has actually died. If you’re unsure, leave it alone in a safe spot (away from your dog and any other pets) and check back in an hour or two. A living possum will eventually get up and leave on its own once it feels safe.
How to Handle a Dead Possum
If the possum is dead, don’t touch it with bare hands. Wear gloves, then cover your gloved hand with a plastic trash bag. Pick up the remains, invert the bag over the body, and seal it. For a larger possum, use a shovel to scoop it into the bag, then rinse the shovel with water. Wash your hands thoroughly afterward, even though you wore gloves.
Call your local animal control agency for pickup instructions. Some municipalities collect dead wildlife, while others allow you to double-bag the remains and place them in your regular trash. Do not leave the carcass in your yard where other animals could scavenge it, as this spreads the same disease risks to neighborhood pets and wildlife.
Clean the area of your yard where the attack happened as well. Hose down any blood or bodily fluids, and keep your dog away from that spot until it’s been washed. If the encounter happened on a hard surface like a patio, a dilute bleach solution will disinfect it effectively.
Preventing Future Encounters
Possums are nocturnal, so most attacks happen during evening bathroom trips or early morning outings. Turning on an outdoor light before letting your dog out gives possums a chance to move along. Supervising nighttime yard visits, even briefly, is the most reliable prevention.
Possums are attracted to pet food left outside, open trash cans, fallen fruit, and compost piles. Removing these food sources makes your yard less appealing. Sealing gaps under decks, sheds, and porches eliminates common nesting spots. Motion-activated lights or sprinklers can also deter them from settling in.
Possums are generally not aggressive and will avoid confrontation when they can. They’re also highly effective at eating ticks and other pests, so coexistence is usually the best approach. The goal isn’t to eliminate them from your neighborhood but to reduce the chances your dog corners one again.