
While mushroom toxicity in large animals is rare, certain types of mushrooms can be toxic to horses. The Death Cap mushroom, for instance, is known to be toxic and can cause poisoning in animals. Horses are generally selective grazers and tend to avoid poisonous plants unless they are hungry and have no other food options. In addition, certain types of mushrooms, such as the Reishi and Cordyceps mushrooms, have been used to improve the health and performance of horses. These mushrooms are known to provide benefits such as improved stress management, muscle recovery, and dental health. Therefore, while some mushrooms can be toxic to horses, others can also offer health advantages when incorporated into their diets.
| Characteristics | Values |
|---|---|
| Toxicity in horses | A rare occurrence |
| Prevalence | More prevalent during rainy, wet weather |
| Number of poisonous species | Many |
| Toxic substances | Vary depending on mushroom type |
| Identification | Difficult, even for experienced mycologists |
| Toxicity | Can cause poisoning in animals |
| Horse behaviour | Horses tend to avoid poisonous plants unless hungry |
| Beneficial aspects | Hoof health, dental health, muscle mass, muscle recovery |
| Types | Reishi, cortycep |
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What You'll Learn
- Some mushrooms are toxic to horses, such as the Death Cap and Yellow Stainer
- Mushroom toxicity in horses is rare
- Horses are selective grazers, and won't eat poisonous mushrooms if they have adequate feed
- Mushrooms can be beneficial for horses' dental health and hoof health
- Certain mushrooms can help racehorses build muscle mass and recover faster

Some mushrooms are toxic to horses, such as the Death Cap and Yellow Stainer
While mushroom toxicity in large animals is rare, some mushrooms are toxic to horses, including the Death Cap and Yellow Stainer. The Death Cap (Amanita phalloides) is a deadly poisonous basidiomycete fungus and mushroom, originating in Europe but introduced to other parts of the world in the late twentieth century. It has been involved in the majority of human deaths from mushroom poisoning and is named for its ability to cause liver and kidney failure. The Death Cap's large fruiting bodies (mushrooms) appear in summer and autumn, with caps that are generally greenish in colour and a white stipe and gills.
The Yellow Stainer (Agaricus xanthodermus), also known as the yellow-staining agaricus or yellow-staining mushroom, is a species of fungus that displays a strong yellow colouration at the base of the stem when cut. It has a phenolic smell and is poisonous to most people, causing gastric upset, stomach cramps, nausea, vomiting, sweating, and diarrhoea. However, a small minority of people can consume it without any negative effects. The Yellow Stainer is very common and widely distributed in North America, Europe, West Asia, North Africa, Southern Africa, and Australia. It occurs in woods, lawns, gardens, and hedgerows in autumn and is one of the most commonly consumed poisonous mushrooms due to its resemblance to edible Agaricus species.
It is important to note that the identification of mushroom species can be challenging even for experienced mycologists, and seeking veterinary advice is crucial if mushroom poisoning is suspected in horses. While certain mushrooms can be toxic to horses, other specific mushrooms are used to support the health and performance of horses. For example, the Reishi mushroom has adaptogenic benefits that help horses process stress, and the Cordyceps mushroom is known for building muscle mass and aiding muscle recovery.
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Mushroom toxicity in horses is rare
Mushroom toxicity is more common in small animals, and there are very few reports of horses getting sick from eating mushrooms. However, it is important to note that mushroom identification can be difficult, even for experienced mycologists. Therefore, if you suspect that your horse has ingested a poisonous mushroom, it is important to seek veterinary advice immediately.
Some mushrooms, such as the Death Cap Mushroom, are known to be highly toxic and can cause serious health issues or even death in animals. It is always better to be safe than sorry when it comes to potential poisoning, so it is recommended to identify any mushrooms on your property and remove any that may be poisonous. This can be done with the help of a mycologist or by providing information on regional location, growth substrate, and tree type.
While mushroom toxicity in horses is rare, some mushrooms can be beneficial to their health. For example, specific mushrooms are used for their adaptogenic benefits, helping horses process stress and improving their trainability. Certain mushrooms are also known to support dental health, hoof health, and muscle recovery. These beneficial mushrooms are often used as supplements for performance horses, such as Olympic horses and racehorses.
In conclusion, while mushroom toxicity in horses is a rare occurrence, it is important to be vigilant about the potential risks of poisonous mushrooms and seek veterinary advice if you have any concerns. At the same time, some mushrooms can provide health benefits to horses when used appropriately.
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Horses are selective grazers, and won't eat poisonous mushrooms if they have adequate feed
While there are thousands of mushroom species, only a small number are poisonous to animals. Mushroom toxicity in large animals is a rare occurrence, and horses are selective grazers. They will normally graze some areas while leaving others alone, and they tend to browse when something succulent is available. Horses also change their eating behaviour across the seasons. In general, there is no need to worry about the toxicity of ungrazed plants, as horses will not eat poisonous plants unless there is nothing else to eat. If they have adequate feed, they usually stay out of trouble.
However, it is important to note that mushroom identification is not easy, and it can be difficult even for experienced mycologists. If you are concerned about the presence of poisonous mushrooms in your horse's pasture, it is recommended to identify the mushrooms and determine their risk level with the help of information on regional location, growth substrate, and tree type.
In some cases, horses have been known to eat poisonous plants when their pasture is over-grazed and they are not being fed correctly. Additionally, during droughts, sheep have been poisoned by ingesting milkweed, which is usually found distasteful. Therefore, it is important to ensure that your horse has access to adequate feed and well-maintained pastures to reduce the risk of them ingesting poisonous mushrooms or other toxic plants.
Interestingly, mushrooms have been used to benefit the health of horses. Specific mushrooms are selected for their different properties. For example, the Reishi mushroom has adaptogenic benefits that can help horses process stress more efficiently, leading to improved trainability and overall health. Other mushrooms, like the Cordyceps mushroom, have been known to aid in muscle recovery and building muscle mass.
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Mushrooms can be beneficial for horses' dental health and hoof health
Mushrooms are not inherently toxic to horses, but certain species of mushrooms can be poisonous and cause mushroom toxicity. However, rather than being toxic, mushrooms can offer several benefits to horses, including improved dental and hoof health.
Dental Health
Mushrooms can support horses with dental disease, and their use for this purpose has been studied at universities in the US and Europe. As horses age, they can develop dental issues similar to humans, and mushrooms can help address these problems.
Hoof Health
The cortycep mushroom, in particular, is known for its ability to aid in hoof health. It has a long history of building muscle mass and aiding in muscle recovery. The most famous example of this is from the 1993 Olympic Games, where the Chinese women's track and field team, led by coach Mr. Ma, broke multiple world records. The team attributed their success to the cortycep mushroom, stating that it helped them recover faster from strenuous training.
Additional Benefits
Medicinal mushrooms have been used in Chinese and oriental medicine for centuries. They have been shown to have immunomodulatory properties, meaning they can stimulate or suppress the immune system to maintain balance. They are also effective in fighting viruses and reducing inflammation. Furthermore, mushrooms can provide a range of macro and micronutrients, including protein, vitamins, and minerals, which support tissue health and healing.
When considering mushroom supplements for horses, it is important to know exactly what you are giving your horse. Look for companies that provide transparent labeling and information about the fungal parts and their percentages in the supplement. Additionally, the way mushrooms are grown and the pesticides used can impact the quality and health benefits they deliver. Organic, toxin-free mushrooms grown using native substances and natural methods are generally preferable.
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Certain mushrooms can help racehorses build muscle mass and recover faster
Mushrooms have been studied for their numerous health benefits for horses. While mushroom toxicity in large animals is a rare occurrence, it is important to note that not all mushrooms are healthy for horses, and choosing the right variety is crucial.
Certain mushrooms, such as Cordyceps, have been shown to build strength and muscle mass in horses. The use of Cordyceps mushrooms dates back to the 1993 Chinese Olympic Team, who broke multiple world records. The team attributed their success to the muscle recovery benefits of these mushrooms, which allowed them to train harder. Similarly, racehorses can benefit from improved muscle recovery and enhanced muscle mass, leading to better performance.
Reishi mushrooms are another type that has been shown to have adaptogenic benefits for horses. Adaptogens help horses manage stress and improve their immunity. By reducing stress levels, Reishi mushrooms can enhance training efficiency and overall performance.
Mushrooms also provide dental health benefits for horses, supporting them with dental disease. Additionally, mushrooms have immunomodulatory properties, meaning they can stimulate or suppress the immune system to maintain balance. The beta glucans found in mushrooms enhance the immune response by increasing the production of disease-fighting white blood cells. Furthermore, mushrooms contain prebiotics that support a healthy gut, and they are rich in antioxidants, which help reduce oxidative stress.
When considering mushroom supplements for racehorses, it is important to consult experts and choose the right blend of mushrooms. The blend is crucial, as racehorses require a different mix of mushrooms than horses that rely more on muscle strength. By incorporating the right mushroom supplements, racehorses can build muscle mass, recover faster, and improve their overall health and performance.
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Frequently asked questions
While most of the thousands of mushroom species do not pose a threat to animals, some poisonous mushroom species can cause animal poisoning. Therefore, it is important to identify the mushroom species before feeding them to your horse.
The clinical signs vary depending on the mushroom type and toxins present. If you suspect your horse has eaten a toxic mushroom, contact your vet right away.
Death Cap and Yellow Stainer mushrooms are toxic.
Mushrooms can be used to improve a horse's dental health, hoof health, and stress management. They can also help with muscle recovery and building muscle mass.
Ensure that your horse is well-fed and that their pasture is adequately grazed. Hungry horses are more likely to eat toxic plants.

























