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Four Leaf Rover Immunity | Cancer Immune Support | Holistic Healthcare for Dogs

S$ 53.90
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Product Summary

The demand for mushrooms is growing, thanks to their unrivaled ability to support a healthy immune system in all animals. Mushrooms are Mother Nature's proven way to support a normal immune response. Our whole mushrooms are double extracted, organic, and low in starch.  We third-party test all of our mushrooms to be low in heavy metals and rich in immune-enhancing beta-glucans.

Immunity is a veterinary-formulated blend of 7 whole mushrooms. Our double extraction process makes sure that the beneficial beta-glucans and triterpenoids in the mushrooms are bioavailable and able to enhance immune, liver, and kidney function.

Our mushrooms are grown in greenhouses on natural wood and substrates in filtered air. The whole mushroom is then double extracted and gently powdered, then tested for safety and high beta-glucan content. 

It's important to note that most of the beta-glucan is found in the fruiting body of the mushroom. But it's expensive and time-consuming to grow mushrooms this way. But we don't do things the cheap and inexpensive way. In comparison, many "mushroom" products are mycelium, which is just the "roots" of the mushroom. To produce this product, mycelium is put in plastic bags filled with sorghum, oats, or rice, then put in a locker to grow. The mycelium is then ground up with the grains to make a high-starch product. Natural mushrooms are low in starch, averaging about 4% carbohydrate.

Each mushroom in Immunity is specifically chosen to help balance your dog’s immune system. Every jar of Immunity features 7 organic mushrooms, all chosen for their synergistic properties.

  • Rich in Beta-Glucans : Beta-glucans are the active part of mushrooms. Our whole mushrooms are a rich source of these powerful immune enhancers.
  • Grown on wood, Not Grains! : Omega-3 fats help maintain a normal inflammatory response and support a healthy immune system.
  • Organic and non-GMO.
  • No starch, preservatives, fillers, binders, or flavourings.

Product Ingredients

Each mushroom in Immunity is carefully crafted and double extracted for maximum beta-glucan and triterpenoid content. Here is the guaranteed beta-glucan content of each mushroom:

  • Turkey Tail - 53%

Turkey Tail is a powerful mushroom that’s well researched for its ability to balance gut bacteria.

  • Reishi - 47%

Scientists have been researching Reishi since the 1970’s. Its highly active beta-glucans can activate the immune system benefiting sick, stressed, and dogs with infections.

  • Cordyceps - 27%

Cordyceps is traditionally used for fatigue after prolonged illness because of its ability to help support normal stamina and endurance.

  • Maitake - 36%

The beta-glucans in Maitake have been extensively researched as potent immune system enhancers.

  • Phellinus - 23%

Research shows Phellinus is a potent, immune-enhancing mushroom. It supports normal detoxification processes in animals.

  • Shiitake - 32%

The highly active beta-glucans in Reishi can help repair leaky gut, activate the immune system and help sick or stressed dogs.

  • Chaga - 16%

Chaga is a nutrient-dense superfood that contains a wide variety of vitamins, minerals and nutrients.

Product Usage Directions

Give orally daily or as directed by your veterinarian.

It will last approximately 60 days for a 1-25 lbs dog, 45 days for a 26-50 lbs dog, 30 days for a 51-75 lbs dog, 22 days 76-100 lbs dog, and 15 days for 101+ lbs dogs.

Product FAQ                                                                  

Q : How do I pick the right mushrooms for my dog?

A : A blend of different mushrooms works best as they work synergistically. Next, look for the highest beta-glucan content. Beta-glucans are the active ingredient in mushrooms and your product should guarantee a large amount. Immunity is veterinarian formulated to provide immune support for all dogs.

Q : What’s mycelium?

A : Mycelium is just the “roots” of the mushroom, and doesn’t contain the whole fruiting body (which is the part that grows above ground). Mycelium doesn’t offer the same high beta-glucan content found in the fruiting body. 

Mushrooms are expensive to grow on their natural substrate (typically wood and trees). So most mushroom products are what’s called “myceliated grain.” This cheap and fast way to grow mushrooms is just mycelium grown in bags of oats, rice or other grains. This whole bag, grains and all, is sold as “mushrooms” but differs from real, whole mushrooms in two ways. First, it’s much lower in beta-glucans and second, the resulting product is mainly starchy grains (real mushrooms are less than 5% starch).

Because of these differences, the FDA states mycelium on grain products can’t be called mushrooms - but many still are. Or, they add a small amount of fruiting body to keep costs down and still claim it’s a mushroom product. 

The only way to know if your dog’s mushroom product is whole mushrooms, is to ask for the beta-glucan amount - not the polysaccharide content or alpha-glucan content, because those are found in any product with a lot of grains

Every Four Leaf Rover mushroom is grown on its natural substrate in greenhouses with filtered air - they’re grown the way nature intended. 

Q : Do Immunity mushrooms come from the whole fruiting body?

A : Yes! Immunity uses every part of the mushroom which includes the fruiting body. Each mushroom is double extracted. The extract is then dried into a powder with all the essential mushroom elements (triterpenoids and beta-glucans) intact. 

Q : How much beta-glucan content is in Immunity? 

A : A whole jar of Immunity averages 34.6% beta-glucans.

Beta-glucans are the active, immune-supporting compound found in mushrooms. Not all mushroom species are the same and carry different amounts of beta-glucans and immune supporting substances like triterpenoids. Our mushrooms are third-party tested to ensure they have a high, guaranteed beta-glucan content, while being low in pesticides and heavy metals.

Here’s the total beta-glucan content in each of Immunity’s mushrooms:

  • Chaga - 16%
  • Cordyceps - 27%
  • Maitake - 36%
  • Phellinus - 23%
  • Reishi - 47%
  • Shiitake - 32%
  • Turkey Tail - 53%

Turkey Tail has the highest amount of immune-supporting beta-glucans, more than any other mushroom. For dogs needing extra support, we recommend adding Four Leaf Rover’s Turkey Tail product to Immunity.

Q : Can’t I just buy mushrooms from the grocery store to give to my dog? 

A : You can. But, while mushrooms from the grocery store are nutritious, they lack high levels of beta-glucan. The mushrooms also have a tough outer wall that’s difficult for dogs (and humans) to break down, so double extraction is a good idea to make the beta-glucans and immune supporting compounds available. 

Q : Are the mushrooms in Immunity raw?

A : The mushrooms in Immunity are not raw, but rather double extracted. Raw mushrooms can irritate your dog’s gut, which can lead to vomiting, diarrhea and cause dehydration. The valuable part of a mushroom is “locked” in its chitin (cell wall). Dogs and people lack the enzyme required to break chitin down, so our mushrooms are double extracted to make them more bioavailable. This process releases the beneficial compounds such as beta-glucan. First, they’re extracted with alcohol and then with water. Don’t worry, they’re not high in alcohol - it’s released during the steaming process. This has been the process in Traditional Chinese Medicine for thousands of years.

Q : Where are Immunity’s mushrooms grown?

A : Our mushrooms come from China, which, believe it or not, is the only place you can find the entire mushroom. With that said, we take safety and purity seriously. Our mushrooms are grown on wood, in filtered air, way up in the mountains, hundreds of miles from the cities. Before the mushrooms leave China, they’re tested for pesticides and heavy metals and once they arrive in the USA, they’re tested again, then tested a third time before we put them into jars.

Q : Which should I buy? Turkey Tail or Immunity?

A : Mushrooms work best synergistically, which is why we recommend Immunity for all dogs. It includes 7 different organic mushrooms, which are veterinarian formulated for their benefits in dogs. 

For dogs needing extra support, we recommend combining Turkey Tail with Immunity because Turkey Tail is very rich in beta-glucans.

JJ E-Homez Holistic Pet Return Policy

Generally, all our products are strictly non-refundable nor exchangeable.

However, in the event you received an incorrect or defective item, or any other valid reason that you can't enjoy your purchase, we will provide a refund or an exchange, case by case basis.

All we ask is that when the item is returned, it should meet the following requirements:

  • Reach out to us to arrange an appointment to drop off your item at 216A Boon Lay Ave.
  • Item returned should be in their original & sealed packaging. Broken seals will not be accepted, unless there's a valid reason, based on case by case basis.
  • Please ensure at least 6 months of shelf life if it's a perishable item.
  • Send us your order confirmation email for refund verification.

Items not eligible for returns:

  • Food related, wearables, beds and carriers due to food safety & hygiene reasons.
  • Items that are purchased from promotional pricing from all of our sales channels.
  • Customers who had a history of returning more than 3 items.

When we receive the refunded/exchange item, we will review the condition of the item, and reach out to you to confirm and issue a refund/exchange within 7 working days. We regret that customers who decline to respect our policy will be ineligible for exchange, returns and refunds.

Do also note that if we find that a product has been intentionally damaged or tampered with, refunds will not be offered.

As generally, returns are not allowed otherwise, please check your order (e.g. type, size, colour, quantity, etc) before checking out. If you need help with any product, chat with us or please send us an email to

Pre-order Items T&C

Please note of the following terms & conditions on all our Pre-order items :

  1. Full payment is required for all Pre-order items.
  2. Expect Pre-order items to be delivered between 3 to 15 working days (depending on which item) starting from your order date.
  3. We will connect via WhatsApp or Email should there be any updates or concerns regarding your order.


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