If you have a furry friend who loves exploring the great outdoors in your backyard, you might be wondering about the potential risks of those mushrooms sprouting up all around. Are backyard mushrooms poisonous to dogs or are they harmless?

Let’s dive into this concerning topic and uncover the truth about backyard mushrooms and their effects on dogs.

Are Backyard Mushrooms Poisonous To Dogs?

Mushrooms have their role to play in the ecosystem, and some varieties can even benefit your lawn’s health. However, when it comes to dogs, we need to be cautious.

The level of toxicity in mushrooms varies widely depending on their type. While some mushrooms are completely safe for your pup to sniff around, others can be potentially deadly if ingested.

Toxic Mushrooms To Dogs: Which Mushrooms Are Poisonous To Dogs?

toxic mushrooms to dogs

Before you go on a mushroom-hunting mission in your backyard, it’s essential to be aware of the harmful varieties that could affect your furry friend.

Out of around 10,000 recognized mushroom species worldwide, about 50 to 100 of them are known to be toxic.

Here are the main types to watch out for:

1. Nephrotoxic Mushrooms: Rare but Dangerous

The chances of your dog encountering nephrotoxic mushrooms are relatively low. While there have been reports of toxicity in humans, unintentional poisoning in pets is not commonly reported.

Signs of ingestion include increased thirst (polydipsia), dehydration, and vomiting. These signs can show up as late as 8 days after ingestion but are usually observed within 12 hours.

2. Neurotoxic Mushrooms

Ever heard of “magic mushrooms”? Well, these fall under the neurotoxic category, along with two other subgroups: isoxazole and hydrazine mushrooms.

Neurotoxic mushrooms are known for causing neurological signs in dogs and can lead to a quick onset of symptoms — sometimes within 30 minutes or up to 6 hours after ingestion.

Isoxazole Mushrooms

Ingesting these mushrooms can cause various alarming symptoms, including disorientation, incoordination, lethargy, hallucinations, seizures, and tremors.

As with the previous types, gastrointestinal issues may occur as well.

Thankfully, neurotoxic mushrooms are generally not fatal for dogs. The main course of treatment would involve controlling your pet’s heart rate with a prescribed drug from your vet.

In most cases, symptoms should subside within 12 hours, especially if the amount ingested was not excessive.

Hydrazine Mushrooms

The main culprit in hydrazine mushrooms is gyromitrin, and ingestion can lead to weakness, tremors, seizures, and gastrointestinal issues like vomiting and diarrhea.

Psilocybin Mushrooms

These are more commonly found inside houses rather than in backyards. The level of toxicity depends on the amount ingested and the size of the dog.

While they aren’t as toxic as some others, watch for symptoms like diarrhea, vomiting, or tremors.

3. Gastrointestinal Mushrooms: Unpleasant Symptoms

Another group of mushrooms to watch out for is the gastrointestinal variety. This group is quite extensive, and the severity of symptoms varies depending on the mushroom ingested.

Gastrointestinal signs can appear rapidly, showing up as soon as 15 minutes after consumption and usually within six hours.

A Sneaky Culprit: The Muscarinic Mushroom

One particular mushroom to be on the lookout for within the gastrointestinal category is the muscarinic mushroom.

Apart from causing typical gastrointestinal symptoms, these mischievous mushrooms can also lead to bronchial secretions, bradycardia, and the notorious “SLUDDE” signs.

While these mushrooms are generally not deadly, it’s still essential to seek veterinary care. Your vet can provide fluids to prevent dehydration and ensure your pup’s speedy recovery.

4. Hepatotoxic Mushrooms: A Lethal Threat To Dogs

Among the vast array of mushrooms, one category stands out as the deadliest and most menacing for both dogs and humans alike – the hepatotoxic mushrooms.

These treacherous fungi can lead to liver failure in your beloved pup, making them a significant concern for pet owners, particularly in certain regions like the northeastern part of the US, California, and the Pacific Northwest.

Recognizing Hepatotoxic Mushrooms

The most alarming aspect of hepatotoxic mushrooms is their delayed symptoms, which can take up to 12 hours to show.

By the time gastrointestinal signs become evident, it might already be too late, and liver failure could rapidly set in. In severe cases, the exposure could prove fatal within a couple of days.

Reacting To Suspected Ingestion

When it comes to hepatotoxic mushrooms, early detection is absolutely crucial.

If you have reason to suspect that your dog has consumed one of these dangerous fungi, don’t hesitate – rush them to the vet immediately. If possible, take a photo of the mushroom to show your vet for definitive identification.

In some cases, your vet might induce vomiting and administer activated charcoal to prevent the toxins from being absorbed. This timely intervention could make all the difference and give your furry friend a fighting chance against this formidable threat.

5. Mushrooms With Muscarinic Agents

White-spotted and light-brown, mushrooms containing muscarinic agents harbor toxins that can wreak havoc on specific nerve endings. These mushrooms are prevalent in western parts of North America.

Should you suspect your dog has ingested one of these nerve-endangering mushrooms, waste no time – call your vet immediately. Early treatment significantly improves the chances of your furry friend pulling through.

Symptoms may emerge within 2 hours or even sooner after ingestion. Look out for signs such as vomiting, diarrhea, urinary incontinence, and abdominal pain. In more severe cases, your dog may experience breathing difficulties, wheezing, or coughing.

Thankfully, your vet might be able to administer an antidote called atropine, which can help to reverse the symptoms and save the day for your precious companion.

6. Toadstool Mushrooms: Distorted Realities

Toadstool mushrooms, often known for their effects on humans, can also pose a threat to your furry companion if ingested.

These mushrooms, characterized by their yellow, orange, or red caps and white-spotted stems, are typically found in wooded areas across North America.

Signs of ingestion can range from appearing as quickly as 30 minutes to as late as 12 hours after exposure. Symptoms may include ataxia, excessive sedation, stiffness, miosis, tremors, weakness, seizures, and in severe cases, even death or coma.

If you suspect your dog has consumed these alluring yet dangerous mushrooms, prompt action is essential. Swift and aggressive treatment by a vet increases the chances of your dog making a full recovery.

Backyard Toxic Mushroom Identification For Dogs

backyard toxic mushroom identification for dogs

Regularly inspecting your yard for toxic mushrooms is a simple but life-saving practice. If you spot any of these harmful fungi, take the following steps to protect your pet:

1. Removing Mushrooms

As soon as you notice mushroom caps sprouting up, remove them from the ground. Leaving them be will result in spore release, leading to more mushrooms. You can pluck them by hand or use a weeding tool for easy removal (read more on how to get rid of backyard mushrooms).

2. Proper Disposal

Never toss the mushrooms into a compost pile. Instead, keep a plastic bag on hand, and place the mushrooms inside the bag once you’ve pulled them out. Seal the bag tightly and throw it away in the trash to prevent spores spread across your lawn.

3. Apply Fertilizer

Using a nitrogen fertilizer can help prevent mushrooms from growing back. This quickens decomposition, leaving nothing for mushrooms to feed on.

Ensure you use a nitrogen fertilizer that is not water-soluble or slow-release. Applying it annually will help maintain a mushroom-free lawn.

You may also be interested in checking out how to get rid of mushrooms in mulch.

What Are Signs Of Mushroom Poisoning In Dogs?

Mushroom poisoning can be a scary ordeal for any dog owner, as the symptoms can vary depending on the type of mushroom ingested, the amount consumed, and the size of the dog.

It’s essential to be vigilant and recognize the common symptoms of mushroom poisoning to act swiftly and protect the dog.

If your dog has ingested toxic mushrooms, you might notice the following symptoms:

  • Diarrhea
  • Vomiting
  • Weakness
  • Abdominal pain
  • Jaundice
  • Lethargy
  • Ptyalism (excessive drooling)
  • Uncoordination
  • Coma
  • Seizures

It’s important to remember that the severity of symptoms can vary, and some signs might not show until it’s too late. Therefore, immediate action is crucial when dealing with suspected mushroom poisoning.

How To Respond If Your Dog Ingests Toxic Mushrooms

If you suspect or know that your dog has consumed mushrooms that could be toxic, waste no time and get in touch with a local Animal ER or your vet right away.

Early intervention is vital, as waiting can lead to increased organ damage and may require more aggressive and costly treatments that may not always save your pet.

If possible, take a picture of the mushroom and show it to your vet. This visual aid can assist the veterinarian in making a proper diagnosis and providing the right treatment promptly.


1. Should I induce vomiting if my dog ate a mushroom?

No, it’s best not to induce vomiting without consulting a veterinarian. Some mushrooms can be more harmful when regurgitated.

2. How long does mushroom toxicity last in dogs?

The duration of mushroom toxicity in dogs varies depending on the type of mushroom ingested and the severity of the poisoning. It can range from a few hours to several days.

3. Are lawn mushrooms poisonous to dogs?

Some lawn mushrooms can be toxic to dogs. It’s essential to identify the specific mushroom and seek immediate veterinary attention if ingestion is suspected.

4. What to do if the dog ate white mushroom in the yard?

If your dog ate a white mushroom from the yard, contact a veterinarian immediately. Take note of the mushroom’s appearance for identification.

5. My dog ate a mushroom in the grass. What should I do?

If your dog ate a mushroom in the grass, stay calm, and contact a veterinarian promptly. Keep a close eye on your pet’s behavior and any symptoms, and don’t try to treat the situation at home.

6. Are haymaker mushrooms poisonous to dogs?

Yes, haymaker mushrooms can be poisonous to dogs if ingested. It’s essential to seek immediate veterinary attention if your dog has eaten them.

7. How do I know if my dog has eaten a mushroom?

Signs that your dog may have eaten a mushroom include vomiting, diarrhea, lethargy, difficulty breathing, seizures, and changes in behavior. If you suspect mushroom ingestion, contact a veterinarian right away.

Conclusion: Are Backyard Mushrooms Poisonous To Dogs?

While not all mushrooms are harmful, being aware of toxic backyard mushrooms can safeguard your dog’s health and well-being.

Always take a moment to scan your backyard for any potential threats before letting your dog roam freely. If you notice any unusual symptoms after outdoor playtime, don’t hesitate to consult your vet (also check out: is mulch safe for dogs?).

Armed with this knowledge, you can create a safe and enjoyable backyard environment where your four-legged companion can thrive without fear of mushroom mischief.

Stay vigilant, and here’s to a happy and mushroom-free outdoor experience for your beloved pup!

By Robin M

Robin remains an active participant in the skilled trades community. His hands-on involvement in projects, coupled with a genuine enthusiasm for helping others succeed in their home improvement pursuits, reflects his commitment to empowering readers with the knowledge they need to tackle projects confidently.

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