4 reviews
Functional Feline® Powder for Cats
Pet Health†
Size
60 Servings
Quantity
100-Day Satisfaction Guarantee • Fast Free Shipping $75+ • Secure Checkout
Functional Feline® Powder is a comprehensive, veterinarian-formulated daily powder blend designed to protect vital organs, enhance resilience, and promote long-term vitality. Whether you’re supporting a kitten through growth and vaccinations, maintaining balance for an active adult, or caring for a beloved senior, this all-in-one formula delivers natural, multi-system support.
A powerful combination of seven organic mushroom extracts with targeted nutrients and adaptogens, including Ashwagandha, Cordyceps, Reishi, fucoidan, probiotics, krill meal, flaxseed, and L-taurine. Each ingredient is selected for its ability to support organ health, modulate stress, and enhance overall wellness.
- Kidney and Liver Protection
- Immune System Training
- Microbiome and Digestive Balance
- Whole-Body Antioxidant and Detoxification Support
- Stress Adaptation and Nervous System Health
- Cardiovascular and Cellular Support
- Healthy Skin, Coat, and Vitality
Administer 1/4 tsp twice daily for each 10 pounds of body weight or as directed by your veterinarian.
Real Mushrooms products are always:
- Rated the #1 Mushroom brand by ConsumerLab
- Organic mushroom identity authenticated by Purity-IQ™
- Verified for active compounds, safety, & purity through third-party testing
- Free of grains, starches, and fillers
- Sourced from mushroom (fruiting bodies) only—never mycelium fermented grain
- Produced in a Good Manufacturing Practices (GMP)-compliant facility
This is our Real Mushrooms Guarantee: no shortcuts, no gimmicks—just real mushrooms.
100 Days
100 Days
Money-Back Guarantee
94,000+
94,000+
5 star reviews
50+ Years
50+ Years
Growing experience
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Real Pets. Real Results.†
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“I see a marked difference at 30 days. Bailey who is 10, is happy and full of energy. A great investment on my furries health and well being.”†
– Verified Customer
“I have 11 cats, ranging in age from 6 months to 18 years, and the cats willingly eat it mixed their raw food. I used to sprinkle Daily Dawg but some of the cats refused to eat it, but this one seems to be a winner.”†
– Verified Customer
“For my Sphynx cat the Functional Feline helps support her healthy digestion. She came to me with many food allergies which had not been addressed, and her gut needed healing. She easily accepts this supplement and I am thrilled to see what great condition she is in since starting to take it. Thank you to the Real Mushrooms company for formulating a supplement specifically for cats.”†
– Verified Customer
“For my Sphynx cat the Functional Feline helps support her healthy digestion. She came to me with many food allergies which had not been addressed, and her gut needed healing. She easily accepts this supplement and I am thrilled to see what great condition she is in since starting to take it. Thank you to the Real Mushrooms company for formulating a supplement specifically for cats.”†
– Verified Customer
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Real Ingredients
Krill Meal (QrillPet™)
Wild-caught Antarctic krill is a rich source of omega-3 fatty acids, marine proteins, and astaxanthin.
It enhances your pet's heart and brain health, supports joint mobility, and contributes to a healthy coat and skin.
Flaxseed Meal (Organic)
An organic source of omega 3 and 6 fatty acids, soluble and insoluble fiber, and plant lignans that serve a detoxification function.
Supports cardiovascular health, improves coat quality, and aids in digestive regularity.
5 Defenders® Mushroom Extract Blend (Organic)
A blend of five functional mushrooms (Reishi, Turkey Tail, Shiitake, Maitake mushrooms and Chaga extract powders) known for their immune-modulating benefits.
Boosts immune function, stabilizes mast cell membranes, has an anti-aging effect, and supports digestive health.
Lion’s Mane Mushroom (Organic)
A mushroom known for its health benefits for both neurologic and digestive health.
Enhances cognitive function, has a calming stress-reducing effect; can benefit senior pets who are experiencing cognitive decline with age.
Cordyceps Mushroom (Organic)
A mushroom extract that is tasty for dogs and cats, and offers numerous health benefits.
Supports muscle recovery and healthy energy levels in senior pets; promotes resilience to normal stress; and helps maintain kidney, adrenal, heart, liver, and lung function.
Saccharomyces cerevisiae boulardii (Prodigi20™)
A yeast-based probiotic that is resilient to heat, enhancing gut health.
Aids in managing digestive issues like IBD, IBS, and improves stool quality while optimizing the canine microbiome.
Astragalus Root
Astragalus root is a traditional herb derived from the Astragalus membranaceus plant, long used in Chinese wellness practices for immune and GI applications.
Astragalus root supports healthy immune function, anti-aging, and GI support in dogs and cats.
Ashwagandha Root (Organic) (KSM-66™)
Ashwagandha root is a traditional herb used in Ayurvedic health practices.
This ancient Ayurvedic herb supports stress reduction, energy, muscle function, immune health, and healthy aging in pets.
Milk Thistle Seed (Organic)
The seed of the milk thistle plant that contains a complex of flavonolignan isomers called silymarin, which is well known for its benefits to the health of the liver.
Promotes liver detoxification and supports overall liver function, has potent antioxidant activity as well.
Chlorella pyrenoidosa (Organic)
A green algae known for its high nutrient content and health benefits.
Supports detoxification, boosts immune response, and offers a rich nutrient profile.
ErgoGold™ Golden Oyster mushroom (Organic)
Ergothioneine is a naturally occurring powerful antioxidant found in the Real Mushrooms golden oyster mushroom extract, ErgoGold™.
Ergothioneine provides antioxidant support and maintains healthy mitochondrial function. It also supports joint health by protecting cartilage from exercise-related oxidative stress.
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5-Time Winner
Best Mushroom Supplement Brand: ConsumerLab.com Survey
Trusted by wellness seekers and professionals alike, our mushroom supplements have earned the rating of Best Mushroom Supplement Products five years in a row by consumers in ConsumerLab.com Annual Supplement Survey.
†Ratings based on results of the 2025 ConsumerLab.com Survey of Supplement Users. More information.
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Real Quality
Real Mushrooms is built on 50+ years of mycological and mushroom-growing expertise. Our founder’s roots trace back to the beginning of the functional mushroom category in North America. Today, we continue to lead the industry in science-backed and effective mushroom supplements.
Purity, Potency, Transparency
Every batch of our supplements is lab-verified for purity. We test for unwanted fillers and various contaminants.
We ensure quality along the entire production process:
- Source: Organically grown mushrooms from trusted long-term partners
- Process: Extracted for bioavailability, lab-verified, and blended/packaged in the USA
- Testing: Each batch is tested for heavy metals, microbial contamination, pesticides & solvents
Nothing hidden. No marketing gimmicks. Just real ingredients, real science, and real results.
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Real Vet. Real Formula.
Dr. Robert Silver, DVM, MS
Chief Veterinary Officer Formulator
Dr. Robert Silver brings to the Real Mushrooms Science Team 40 years of practical clinical experience treating small and large animals with diet, acupuncture, nutraceuticals, botanicals, and medicinal mushrooms.
- Graduated from Colorado State's College of Veterinary Medicine in 1982.
- Established one of the first integrative vet clinics in the USA in Boulder, CO in 1993.
- Adjunct faculty member at several veterinary colleges.
- Published papers and books on the topic of alternative medicines for pet health.
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Real Mushrooms vs. Other Brands
Not all mushroom supplements are created equal. Real Mushrooms has set the standard for the most effective mushroom products because we have never compromised on quality. Here’s how Real Mushroom supplements compare with the other leading brands on the market.
Real Mushrooms
100% organic mushrooms
Guaranteed >30% beta-glucans
Hot water extracted or dual extracted
No starch · no fillers
Full disclosure of ingredients, sourcing, testing and extraction
Cost-effective for active compound concentration in every serving
50+ years mushroom cultivation expertise
Other Brands
Mycelium fermented grain (starch + fillers)
Typically low, often undisclosed
Improperly extracted or simply dried and ground
Commonly contains rice, oats or sorghum starch and/or maltodextrin
Vague or misleading marketing and unclear labeling
Very expensive for amount of active compounds actually present
Mislead customers with ambiguous labeling and filler-heavy products
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Take the guesswork out of your mushroom supplement. Start enjoying real results now.
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Karen Y. Product was recommended by my veterinarian. My cats are picky eaters, but they like this product either because of the taste or because there is no taste or smell. The product mixes in raw food very easily.
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D N. My almost 15 year old cat wasn’t looking his best. Shortly after starting Functional feline powder, I noticed his coat was soft and silky and his vomiting was much better. He even likes the taste unlike a different mushroom product.
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Angelita I am thrilled that my cats are actually eating this, which is very rare for any supplements I try to give them. I hope it'll help improve their health. The only downside is the high price.
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Helen My cats are 12 years old and I wanted to have a healthy supplement for their overall health. This is amazing. They are very energetic and they are in good health. Thank you Real Mushrooms for this amazing product and the subscription plan.
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Frequently Asked Questions
All our mushroom extracts are from the leading supplier of organic mushroom extracts: Nammex. They have over 40 years of mushroom growing experience and were one of the first companies to bring organic functional mushroom extracts to North America.
Their ingredients go through rigorous quality control and are tested twice for heavy metals, agricultural chemicals and microbial contamination to ensure they meet all standards for dietary supplements of this nature. All of their extracts are made from certified organic mushrooms (fruiting bodies), organically grown or wildcrafted from deep within mountain regions of China.
Mushrooms used for dietary supplements are seldom grown in North America since they are too expensive. China is the leading supplier of mushrooms worldwide and supplies over 90% of the world’s mushrooms.
It has a rich history of mushroom use as both food and medicine and is the birthplace of mushroom cultivation, with shiitake being farmed in the early 1200s. China is one of the only places in the world where you can get 100% organic mushroom (fruiting body) extracts that can be sold at an affordable price.
It is extremely important to distinguish the difference between mushrooms and mycelium.
Mushrooms are the "fruit" and reproductive stage of these organisms, while the mycelium is the root system or "body" of the fungus.
Mushrooms contain much higher levels of active compounds like beta-glucans, and there is a large body of research on them. They have also been consumed for thousands of years as food, and many health benefits have been shown from just mushroom consumption.
Mycelium is commonly grown on a grain substrate, and this grain cannot be separated from the mycelium, so much of the final product is actually grain with no mushrooms present. This shows up in high amounts of starch and low amounts of active compounds like beta-glucans.
For these reasons, Real Mushrooms® only utilizes mushrooms in all of its products, with verified levels of important active compounds like beta-glucans, and is always guarded against starchy fillers like grain.
NSF certification ensures the product is manufactured under strict cleanliness, safety, and quality control guidelines. This means you can trust that Daily Dawg Powder meets the highest standards for pet supplements.
Functional Feline® is a blend of mushroom extracts, herbs, and minerals in a convenient meal-topping powder. It provides whole-body support for cats of all ages, helping promote a normal response to occasional stress while supporting healthy immune, digestive, nervous, and urinary function.
Administer approximately 1⁄4 teaspoon mixed with food twice daily, or as directed by your veterinarian.
Sprinkle the powder directly onto wet food or mix it into a small amount of a favourite treat.
If your cat is picky or not responding well, we recommend starting with a very small amount, even just a tiny sprinkle. Gradually increase the amount over several days to help your cat adjust to the new taste and smell.
Remember, the administration guidelines are simply a starting point. Every pet is unique in their needs and response.
There are no reported negative interactions between mushrooms and common pet supplements or medications. Still, we always suggest checking with your veterinarian before starting any new supplement routine.
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