Toxic Mushrooms and Dogs: Why Wet Weather Increases the Risk

After periods of rain—especially during autumn and spring in Queensland—you may notice mushrooms popping up across your lawn, in parks, and along bush tracks. While many may seem harmless, some wild mushrooms can be extremely toxic to dogs, even in small amounts.

At Jordan Dog Training, we believe education and prevention are the best protection. Here’s what every dog owner needs to know about the risks of toxic mushrooms, especially after heavy rain.

Why Mushrooms Are More Common After Rain

Mushrooms thrive in damp, humid environments. After a stretch of wet weather followed by mild warmth, fungal growth surges. Mushrooms can appear overnight and are commonly found in:

• Grassy lawns
• Garden beds
• Mulched areas
• Compost heaps
• Bush tracks and under trees

These are all places dogs love to sniff and explore. Unfortunately, while many fungi are harmless, several common species in Australia can be dangerous or even deadly to dogs.

The Most Common Toxic Mushroom in Queensland: Yellow-Staining Mushroom

Fast Facts: Yellow-Staining Mushroom (Agaricus xanthodermus)

• Extremely common in Queensland, especially in lawns and garden beds
• Often mistaken for edible field mushrooms
• Bruises yellow when cut or scratched
• Has a strong, unpleasant odour (chemical or inky smell)
• Causes vomiting, diarrhoea, and abdominal pain in dogs
• Found in suburban areas, including parks and yards after rain
• Not usually fatal—but can cause significant distress and dehydration

Because it is so widespread and easy for dogs to access, this mushroom is considered the most frequent cause of mushroom-related illness in dogs in Queensland.

Other Dangerous Mushroom Species in Australia

While the yellow-staining mushroom is the biggest concern locally, other toxic species found across Australia include:

• Death Cap (Amanita phalloides) –Rare in Queensland but extremely poisonous. Just a small amount can cause fatal liver damage. More common in Canberra and parts of Victoria.
• Ghost Fungus (Omphalotus nidiformis) –Native to Australia and found on rotting wood and tree stumps. It glows faintly in the dark and can cause vomiting and cramping.
• Green-spored Parasol (Chlorophyllum molybdites) –Common in grassy areas after rain. Causes severe gastrointestinal distress and is often mistaken for safe mushrooms.

Symptoms of Mushroom Poisoning in Dogs

Symptoms vary based on the type and amount of mushroom ingested, but common signs include:

• Vomiting and diarrhoea (sometimes with blood)
• Weakness or lethargy
• Drooling
• Abdominal pain
• Disorientation or unsteadiness
• Seizures or tremors
• Jaundice (yellowing of gums, eyes or skin)
• Collapse

Some of the most dangerous mushroom toxins cause delayed symptoms, particularly liver or kidney failure that can take hours—or days—to appear.

What to Do If Your Dog Eats a Mushroom

If you know or suspect your dog has eaten a mushroom:

1. Act immediately.
2. Remove any mushroom remnants from their mouth, if it’s safe to do so.
3. Take photos of the mushroom and where it was found—this helps with identification.
4. Contact your vet or an emergency clinic straight away.
5. Do not wait for symptoms to appear—time is critical.

Even if your dog seems fine, do not delay. Some of the most dangerous mushrooms cause silent but deadly damage to internal organs.

Prevention Tips

• Check your yard daily after rain and remove any mushrooms you find.
• Supervise your dog closely in parks or bushland, especially in mulched areas.
• Keep your dog on-lead in unfamiliar areas following wet weather.
• Teach strong “Leave it” and “Drop it” commands—these are essential for preventing scavenging.
• Consider a basket muzzle for dogs who are compulsive scavengers while on walks.

How Jordan Dog Training Can Help

At Jordan Dog Training, we focus on real-world safety skills that protect your dog from environmental hazards—like mushrooms, cane toads, and food scraps.

We specialise in:

• Teaching “Leave it” and “Drop it” using positive, effective methods
• Recall training to stop dogs before they get into trouble
• Building impulse control through enrichment and structured sessions
• Helping curb scavenging behaviour with practical, personalised advice

If you haven’t already, check out our blog on Mastering the “Leave It” Command—it’s a vital life skill that can literally save your dog’s life.

If your dog tends to grab things on walks or in the backyard, we can help you get it under control—safely and kindly.

Final Thoughts

After wet weather—particularly in autumn and spring—mushrooms can appear quickly and unexpectedly. The yellow-staining mushroom, the most common toxic mushroom in Queensland, poses a serious risk to curious dogs exploring their own backyards.

If your dog has eaten or even licked a mushroom, don’t wait—contact your vet immediately. Fast action can be the difference between a full recovery and serious harm.

And if you’re ready to boost your dog’s recall, build safer habits, or finally teach a solid “Leave it,” our friendly team is here to support you every step of the way.

Disclaimer:

The information provided in this blog is intended as general guidance and is based on our experience as dog trainers and behaviourists. It is not veterinary advice and should not replace consultation with a qualified veterinarian. If you have any concerns about your dog’s health, wellbeing, or mobility, we always recommend speaking with your vet to ensure the best care for your dog.