Foods That Are Poisonous To Possums

Possums are a common sight in Australian backyards, often hopping around fruit trees or rummaging through gardens at night. While it might be tempting to share snacks with them, many human foods are dangerous—or even deadly—to possums.

Their digestive systems are designed for native leaves, fruits, flowers, and occasional insects, not chocolate bars, onions, or processed foods. Feeding the wrong foods can cause serious health problems, from digestive upset to poisoning, and can even be fatal.

In this guide, we’ll highlight the foods that are poisonous to possums, explain why they’re harmful, and offer tips on how to keep these iconic marsupials safe in your backyard.

Common Foods That Are Toxic to Possums

Feeding possums might seem harmless, but some everyday foods can be extremely dangerous. Here are the most common culprits:

1. Chocolate

• Contains theobromine and caffeine, which possums cannot metabolise properly.


• It can cause nervous system issues, vomiting, seizures, or even death.

2. Avocado

• Contains persin, a fungicidal toxin harmful to many animals.


• It can lead to cardiac or respiratory problems in possums.

3. Onions & Garlic

• Both contain compounds that damage red blood cells, potentially leading to anaemia.


• Even small amounts can cause digestive upset and weakness.

4. Citrus Fruits

• High acidity can upset possums’ digestive systems.


• Causes diarrhoea, nausea, or general discomfort.

5. Processed Foods

• Foods high in sugar, salt, or artificial additives are not suitable for possums.


• It can result in obesity, organ damage, or nutritional deficiencies.

6. Alcohol & Caffeine

• Extremely toxic even in small quantities.


• It can lead to rapid deterioration of health and death.

Feeding these foods—even accidentally—can put possums at serious risk.

Why These Foods Are Dangerous

Possums have specialised digestive systems designed to handle leaves, fruits, flowers, and occasional insects. Many human foods contain compounds that their bodies cannot process, leading to serious health problems.

How Toxic Foods Affect Possums:

• Nervous System: Substances like caffeine and theobromine (in chocolate) can overstimulate the nervous system, causing seizures or even death.


• Digestive Issues: Acidic foods, onions, garlic, and processed snacks can upset the stomach and intestines, leading to vomiting, diarrhoea, or dehydration.


• Blood Disorders: Some compounds, such as those in onions and garlic, attack red blood cells, potentially causing anaemia.


• Cardiac & Respiratory Problems: Persin in avocados can interfere with heart and lung function, especially in smaller possums.

Even foods that seem harmless can quickly overwhelm a possum’s system, making backyard feeding risky unless you stick to natural, safe options.

Safe Foods for Possums

To help possums thrive in your backyard without putting them at risk, it’s important to stick to foods that are natural and suitable for their diet.

1. Native Leaves and Foliage

• Examples: Eucalyptus, wattle, and acacia leaves.


• Provides essential nutrients and mimics their natural diet.

2. Fruits

• Suitable options include apples, pears, berries, and plums in moderation.


• Avoid citrus or overripe fruit that may cause digestive upset.

3. Flowers and Blossoms

• Native flowers such as grevillea, hibiscus, and bottlebrush provide nectar and variety.

4. Occasional Insects

• Small insects or larvae can be a source of protein for some possum species.

5. Possum-Safe Feeders

• If you want to feed them, use specially designed wildlife feeders with safe pellets or fruits.

Feeding possums the right foods helps them stay healthy, active, and closer to their natural behaviour—without risking illness or poisoning.

How to Protect Possums in Your Garden

Creating a possum-safe environment ensures they can forage naturally without coming into contact with dangerous foods.

1. Avoid Leaving Human Food Outside

• Don’t leave scraps, chocolate, or processed foods accessible.


• Secure compost bins and bins with lids to prevent accidental ingestion.

2. Plant Native Trees and Shrubs

• Provides natural food sources and shelter.


• Encourages possums to feed on what’s safe rather than human food.

3. Educate Neighbours and Visitors

• Inform others not to feed possums harmful foods.


• Share knowledge about safe backyard feeding practices.

4. Install Possum Boxes

• Gives possums a safe nesting space away from human activity.


• Reduces the likelihood of them searching for unsafe food in gardens or on roofs.

By taking these steps, you can coexist with possums safely and reduce the risk of accidental poisoning.

What to Do If a Possum Eats Something Toxic

Even with precautions, accidents can happen. If you suspect a possum has eaten something poisonous, immediate action is crucial.

1. Recognise the Signs of Poisoning

• Lethargy or unresponsiveness


• Vomiting or diarrhoea


• Tremors, seizures, or laboured breathing


• Disorientation or unusual behaviour

2. Contact Wildlife Rescue or a Veterinarian

• Call your local wildlife rescue organisation or vet experienced with native animals.


• Provide details about the food ingested and the possum’s symptoms.

3. Minimise Stress

• Keep the possum in a quiet, dark, and warm area while waiting for help.


• Avoid handling unless necessary, as this can increase stress and worsen the condition.

4. Do Not Try Home Remedies

• Giving water or food may worsen the situation.


• Only trained professionals should provide treatment.

Prompt action can significantly increase the possum’s chances of recovery.

Conclusion

Feeding possums may seem like a kind gesture, but offering the wrong foods can have serious, even fatal consequences. Chocolate, avocado, onions, garlic, citrus, processed foods, alcohol, and caffeine are all dangerous and should never be left accessible to these native marsupials.

Instead, stick to safe, natural foods like native leaves, fruits, flowers, and occasional insects. Creating a possum-friendly garden, securing human food, and educating others about safe feeding practices can help ensure possums thrive without harm.

If a possum does accidentally consume something toxic, contact wildlife rescue immediately and provide a calm environment while waiting for professional assistance.

By understanding which foods are harmful and how to protect them, we can safely coexist with possums and enjoy their presence in our backyards for years to come.