Is Stinkhorn Mushroom Toxic to Dogs? What to Do If Eaten

Name: Is Stinkhorn Mushroom Toxic to Dogs? What to Do If Eaten
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

Stinkhorn mushrooms are not classically toxic to dogs, and most exposures cause mild stomach upset at worst. The real danger is misidentification, because stinkhorns can be confused with highly poisonous mushrooms, and no owner or veterinarian can reliably tell them apart in the field. If your dog ate any wild mushroom, treat it as a potential emergency until a veterinarian says otherwise.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Stinkhorns (including the lizard's claw stinkhorn, Lysurus cruciatus) are not considered classically poisonous, and the one documented dog case caused only gastrointestinal signs [1].
Mushroom identification is genuinely hard, even for experts, so every unidentified mushroom ingestion should be treated as toxic until proven otherwise [2][3].
Up to 100 mushroom species in North America are toxic, and Amanita species cause the vast majority of reported poisonings [3][4].
Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 right away if your dog ate a wild mushroom.
Do not induce vomiting unless a veterinarian tells you to.

Is Stinkhorn Mushroom Toxic to Dogs?

Short answer: stinkhorns are not classically toxic. They belong to a group called phalloid fungi, named for their shape, and they are best known for the foul, rotting-meat smell they use to attract flies. That smell is why dogs find them interesting and why owners often catch their dog sniffing or eating one.

The veterinary literature on stinkhorns is thin. One published case describes a 1 year old dog in southern Brazil that developed gastrointestinal syndrome after eating Lysurus cruciatus, a common stinkhorn species [1]. Gastrointestinal syndrome means vomiting, diarrhea, or belly discomfort. The dog did not develop liver failure or neurologic signs, which is the pattern you would expect from the truly dangerous mushrooms.

That said, "not classically toxic" is not the same as "safe to eat." Stinkhorns grow in soil, mulch, lawns, and decaying plant matter, and they can pop up overnight after rain. They also grow right alongside mushrooms that can kill a dog. The Pet Poison Helpline advises treating all mushroom ingestions as toxic until proven otherwise, because proper identification can only be done by a mycologist [2].

Which Parts and Products Matter?

The whole mushroom matters, including the cap, stalk, and the slimy spore mass (the gleba) that smells so bad. Dogs usually eat the entire above-ground structure in one bite, which destroys the features a mushroom expert would use to identify it.

Dried stinkhorn products sold for human use are not something you should give your dog. There is no established safe dose for dogs, and your veterinarian would set any dose based on your dog's weight and health. Keep all mushroom powders and supplements out of reach.

The Toxic Principle and What It Does in the Body

Here is the problem with stinkhorns. They do not have one famous toxin the way death cap mushrooms do. The toxin profile of stinkhorns is not well established in veterinary research, and the single published dog case points to a gastrointestinal reaction instead of organ damage [1].

The mushrooms that actually kill dogs work very differently. Amanita phalloides, the death cap, contains amatoxins that destroy liver cells. A 15 week old Dachshund that ingested amanitin-containing mushrooms developed lethargy that progressed to sternal recumbency and died about 12 hours after presentation, with widespread liver cell death on necropsy [5]. Amanita muscaria, a different species, causes neurologic signs. A 5 year old Labrador Retriever developed vomiting, diarrhea, tremors, seizures, and somnolence and died despite treatment, and the mushroom was confirmed as Amanita muscaria by PCR testing because the fragments in the stomach could not be identified visually [6].

That last detail matters for you. Even a veterinary diagnostic laboratory could not identify the mushroom by looking at it. The pieces were damaged, fragmented, and discolored [6]. If trained pathologists cannot do it, you cannot do it from a photo on your phone.

Other toxic mushrooms cause liver failure, neurotoxicity, gastrointestinal irritation, or kidney damage, and most cases are never confirmed because routine tests exist for only a couple of mushroom toxins [7]. In general, amanita poisoning can be lethal, while ingestion of many other toxic mushrooms is self-limiting and not life threatening [7].

Signs to Watch For and Their Timeline

Signs depend on the mushroom and the amount eaten, and they can range from mild to severe [3]. General signs of mushroom poisoning include vomiting, diarrhea, abdominal pain, neurologic signs such as walking drunk, tremors, seizures, or hallucinations, and liver failure signs such as black tarry stool or yellow gums [2].

Timeline is the part owners ask about most. With gastrointestinal mushrooms, vomiting and diarrhea often start within a few hours. With amatoxin mushrooms, a dog may seem to recover after early vomiting and diarrhea, then crash 1 to 3 days later as the liver fails. That quiet period is a trap. Do not relax just because your dog looks better on day two.

A large Norwegian study of 421 mushroom ingestions in dogs found that about 64 percent of cases were managed at home, 33 percent were hospitalized and treated, and 3 percent were observed by a veterinarian without treatment [8]. The survival rate was 98.6 percent, with deaths occurring after ingestion of Amanita muscaria and other species [8]. Those numbers are encouraging, but they reflect cases where a poison center was involved and mushrooms were often identified by a mycologist or certified expert [8]. Your situation may be different.

What to Do Right Now If Your Dog Ate Stinkhorn

Act first, identify later.

Move your dog away from the area and pick up any remaining mushroom pieces. Put them in a paper bag or a sealed container.
Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661.
Take the mushroom sample with you to the vet so the species and toxicity can be assessed. If you cannot get a sample, describe exactly where your dog found it [9].
Do not induce vomiting unless a veterinarian tells you to. Inducing vomiting is a medical decision, and it is not safe for every dog or every mushroom.
Note the time of ingestion and any signs, even mild ones. Write it down so you do not have to rely on memory.

If you are not sure whether your dog actually swallowed anything, assume they did. The Pet Poison Helpline's guidance is blunt: when you cannot monitor every bite, assume everything is toxic, and if your dog does ingest a mushroom, act quickly [3]. For a closer look at how veterinarians sort mild exposures from emergencies, see My Dog Ate a Mushroom: How to Tell If It's Toxic.

What Not to Do

Do not wait for a photo ID from a Facebook group or an app. Do not feed your dog bread, milk, oil, or salt water. Do not assume that because the mushroom smelled awful, it must be harmless. And do not skip the vet visit because your dog seems fine an hour later. Amanita signs can be delayed, and early detection of amanitin exposure helps veterinarians make timely treatment decisions [7].

Veterinary Treatment for Mushroom Ingestion

Treatment depends on what your dog ate and how sick they are. If ingestion was recent, your veterinarian may induce vomiting and give activated charcoal to bind the toxin [2]. They will likely run blood work to monitor liver values and may use liver protective medications such as SAMe or milk thistle [2].

For confirmed amatoxin poisoning, treatment is more aggressive. A case series of 5 dogs with amatoxin mushroom poisoning used an adapted version of a human protocol that included percutaneous biliary drainage, octreotide, and early nil per os orders (no food by mouth). All 5 dogs survived to discharge [10]. That is a serious, hospital-level intervention, and it shows why early referral matters.

In general, mushroom poisoning treatment is supportive, with specific measures available for amanitin and psilocin exposures [7]. Your veterinarian calculates every drug dose from your dog's weight, current lab work, and overall health. There is no home dose you should ever give on your own.

Outlook After Eating a Stinkhorn

If your dog truly ate a stinkhorn and nothing else, the outlook is generally good. The one published case involved gastrointestinal signs only [1]. Most dogs with mild gastrointestinal mushroom exposures recover with supportive care.

The outlook changes completely if the mushroom was an amanita or another organ-damaging species. Amanita poisoning can be lethal [7]. One dog with amanitin poisoning died roughly 12 hours after presentation despite supportive care [5]. Another died after Amanita muscaria ingestion despite being briefly stabilized [6]. On the other side, all 5 dogs in the biliary drainage case series survived with intensive treatment [10].

The honest answer is that outlook depends on identification and speed. That is why veterinarians do not wait for a positive ID before starting treatment.

Prevention and Safer Alternatives

Prevention is mostly about yard management and supervision.

Walk your dog on a short leash in areas with lots of wild mushrooms, and steer them away from mulch beds and rotting logs.
Check your yard after rain. Mushrooms can appear overnight, and stinkhorns are famous for it.
Remove and dispose of mushrooms in your yard, wearing gloves if you prefer. Wash your hands afterward.
Teach a solid "leave it" cue and reward your dog for ignoring ground finds.
Supervise outdoor time closely. The Pet Poison Helpline recommends monitoring all interactions when your dog is outside [3].

If your dog likes to scavenge, this is also a good time to review other outdoor hazards. Dogs that eat slugs and snails while hunting for mushrooms face a separate concern, covered in My Dog Ate a Slug or Snail: Should I Worry About Lungworm?. Dogs that chew plants in the same yard may need Dog Ate Toxic Plant.

For safer chews and treats, stick with commercial products formulated for dogs. There is no safe wild mushroom substitute, and no home recipe makes a wild mushroom safe.

Limitations and When to Contact a Veterinarian

Individual cases need a veterinarian. No article can tell you what your dog ate or how their body is responding.

Contact a veterinarian the same day if your dog ate a wild mushroom and is acting normal, or if you are unsure whether they swallowed it. Early decontamination and blood work are most useful in the first hours.

Go to an emergency clinic now if you see repeated vomiting, diarrhea, tremors, seizures, wobbliness, drooling, collapse, yellow gums, black tarry stool, or unusual sleepiness. These are red flags for neurologic or liver involvement [2].

Schedule a routine visit if your dog had a mild episode days ago and seems fine, but you want liver values checked. Blood work monitoring is part of standard mushroom exposure care [2].

Frequently Asked Questions

Can a stinkhorn mushroom kill my dog?

There is no published report of a dog dying from a stinkhorn mushroom. The one documented case caused gastrointestinal signs only [1]. Deaths in the mushroom poisoning literature are linked to amanita species and other organ-damaging mushrooms [8][6][5].

How fast do mushroom poisoning signs show up in dogs?

Gastrointestinal signs often appear within hours, while liver failure from amatoxins can take 1 to 3 days to become obvious. A dog may look temporarily better before getting much worse. That delay is why veterinarians treat suspected amatoxin exposure aggressively even when the dog seems stable at first [7].

Should I make my dog throw up after eating a mushroom?

No, not unless a veterinarian tells you to. Inducing vomiting is a medical procedure, and it is not appropriate for every dog or every mushroom. Your veterinarian will decide whether it helps based on timing, the mushroom involved, and your dog's condition [2].

Can I identify the mushroom myself to save a vet visit?

No. Mushroom identification requires a mycologist, and even diagnostic laboratories can fail when the sample is chewed or fragmented [2][6]. Take the sample to your vet instead and let the professionals handle it [9].

What information should I give the poison hotline?

Give your dog's weight, the time of ingestion, what signs you see, and any photos or physical samples of the mushroom. Also describe where your dog found it, since location helps narrow down species [9]. Have your veterinarian's phone number ready so the toxicologist can coordinate care.

References

Dog intoxication by lizard's claw mushroom, Lysurus cruciatus (higher Basidiomycetes) in southern Brazil. International journal of medicinal mushrooms, 2014.
Mushrooms Poisonous To Dogs. Pet Poison Helpline.
Are Mushrooms Deadly to Dogs. Pet Poison Helpline.
Mushroom poisoning cases in dogs and cats: diagnosis and treatment of hepatotoxic, neurotoxic, gastroenterotoxic, nephrotoxic, and muscarinic mushrooms. The Veterinary clinics of North America. Small animal practice, 2012.
Diagnosis of Amanita toxicosis in a dog with acute hepatic necrosis. Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc, 2007.
Fatal Amanita muscaria poisoning in a dog confirmed by PCR identification of mushrooms. Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc, 2019.
Mushroom Poisoning Cases in Dogs and Cats: Diagnosis and Treatment of Hepatotoxic, Neurotoxic, Gastroenterotoxic, Nephrotoxic, and Muscarinic Mushrooms. The Veterinary clinics of North America. Small animal practice, 2018.
A retrospective evaluation of mushroom ingestions in 421 dogs in Norway (2011-2022). Veterinary record open, 2023.
What to Do If Your Dog Eats a. Pet Poison Helpline.
Clinical recovery of 5 dogs from amatoxin mushroom poisoning using an adapted Santa Cruz protocol for people. Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001), 2021.