• Austin and Kat Mushroom Immunity supplement toppers in a jar with mushroom slices, promoting immune support and health.
  • Austin and Kat Mushroom Immunity supplement topper displayed in a natural lifestyle setting, highlighting fresh mushroom ingredients.
  • Austin and Kat Mushroom Immunity supplement toppers in clear glass jar with mushroom-shaped label on a wooden surface.
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Harper's

Mushroom Immunity

Mushroom Immunity

Optimize your pup’s immune system as they continue their journey to top-dog status. Naturally high in polysaccharides and beta-glucans, this synergistic blend of seven multi-functioning mushrooms delivers next-level adaptogenic fungi together in one convenient serving.

Read our Expert Guide on Our Mushrooms

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Seven functional mushroom varieties chosen specifically for immune and gut health, two systems that are more connected than most people realize. 7 Mighty Mushrooms Powder is built as a daily foundation, not a quick fix, with each mushroom included because it contributes something distinct to the larger formula.

This blend is designed to support the body's normal defenses, digestive balance, and long-term resilience through consistent use. Functional mushrooms are valued because they bring a broad range of naturally occurring compounds, including beta glucans and other supportive nutrients that help make them useful in daily wellness routines.

The strength of this formula is not just that it includes seven mushrooms. It is that the blend is built with a clear purpose: support the systems that help pets stay steady from the inside out. Gut health influences immune function. Immune balance influences overall homeostasis. Daily consistency is where that support begins to matter.

Austin and Kat's Immune System Meal Topper - Elevate Your Pup's Health with Chaga, Reishi, and Lion's Mane. Crafted to help pups on their journey to top-dog status, this synergistic blend of seven USDA Organic mushrooms naturally rich in polysaccharides and beta-glucans delivers adaptogenic fungi in one convenient serving

Active Ingredients:
(All USDA Organic Mushrooms) Chaga, Cordyceps, Lion's Mane, Maitake, Reishi, Shiitake, Turkey Tail

Inactive Ingredients:
None


We focus on using meaningful ingredients in purposeful amounts and presenting them clearly on the label. No unnecessary extras. No decorative claims. Just thoughtfully built formulas designed to do what they are intended to do.

Australian and Kat 7 Mighty Mushrooms supplement toppers with mushroom powder in a clear jar, showcasing the natural mushroom blend.

How much should I give my pet?
Give one scoop for every 25 lbs of pet weight, per day.

1 scoop = 1 half-teaspoon

The whole mushroom matters.

We use mushrooms that are grown to full maturity and carefully harvested to preserve the natural compounds found throughout the organism. By working with the complete life cycle of the mushroom, we deliver a naturally balanced profile of nutrients, including beta glucans and other supportive compounds.Quality comes from how the mushroom is grown, when it is harvested, and how consistently it is produced, not from focusing on just one part of the organism.

Austin and Kat was built differently from the very beginning. We are employee owned, female founded, and still led by the same hands that shaped the company from day one. Every formula is made by our own team in our own facility, not handed off to outside manufacturers. The people who craft these products are the same people who bring them home to their own pets, which keeps our standards personal, consistent, and accountable in a way that cannot be outsourced.

Explore Kat's Story here
Learn about our standards here
Access our lab test results here

Immune System Health*
Adaptogenic Support*
General Wellness*
Seasonal Support*

Seven mushrooms, countless benefits. This isn't just throwing popular fungi together - it's a carefully researched combination of immune-supporting powerhouses like turkey tail and cognitive enhancers like lion's mane. USDA organic quality meets functional medicine principles in one convenient scoop.

  • Seven organic mushrooms from quality cultivation sources
  • Never any synthetic immune boosters or chemical additives
  • Handcrafted in small batches for maximum freshness
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Who Needs This Formula?

Especially good for developing pets and immune-conscious families, formulated to help support natural defenses and seasonal wellness through functional mushroom nutrition. This immune-supporting formula benefits young adults, pets with seasonal sensitivities, and animals whose families want to support natural immunity. Ideal for pets who could benefit from adaptogenic support, animals facing seasonal challenges, and households wanting to boost natural defense mechanisms. Perfect for supporting pets through seasonal transitions, environmental changes, and the ongoing development of robust natural immunity as part of comprehensive wellness maintenance.

Science Behind The Scenes

This immune-optimizing formula represents advanced mycological research through a synergistic seven-mushroom blend designed for comprehensive wellness support. Turkey tail's polysaccharopeptides and beta-glucans provide research-documented immune system modulation, while lion's mane contributes hericenones and erinacines for cognitive and nervous system support. Reishi's triterpenes offer adaptogenic and hepatoprotective benefits, while cordyceps enhances cellular energy production and oxygen utilization. Maitake's beta-glucans support immune system training, chaga provides powerful antioxidant compounds, and shiitake contributes lentinan for additional immune support. This combination recognizes that optimal immune function requires multiple complementary pathways working together to support the body's natural defense mechanisms and adaptive responses.

Unmatched Quality

Sourced By Us
Every ingredient in this formula is independently sourced from serious global suppliers — not pulled from a generic catalog. Austin and Kat partners directly with small, values-aligned producers who work at the source, because the quality of what goes in determines everything about what comes out.
Sourced By Us
We do things differently
We don’t rely on brokers or mystery supply chains. We source our ingredients ourselves, working directly with trusted partners we know and understand.
Made By Us
We’ve always taken pride in doing things differently. From the very beginning, we’ve been committed to crafting the highest-quality wellness solutions for pets ourselves — formulating every product, and handcrafting everything in small batches right here at our Seattle Makery.
Made By Us
Most brands don't made their stuff
Every product is handcrafted in small batches by us — no outsourcing to manufacturers we hardly know, and no cutting corners.
NASC certified
As a proud NASC-certified company, every product we make is developed and manufactured in alignment with strict quality and safety standards. Our processes are documented, reviewed, and continuously monitored to ensure consistency from batch to batch.
NASC certified
What The seal means
Quality is not just a promise. It is verified. We carry the NASC Quality Seal, which means our facilities, processes, and labeling meet strict standards set by the NASC.
PSC accredited
We partner with farms, fisheries, and producers who share our commitment to responsible sourcing and long-term sustainability. Every supplier is carefully evaluated to ensure ingredients meet rigorous standards for quality, traceability, and ethical production.
PSC accredited
We manage our impact
Responsibility goes beyond the product itself. We are proud to be accredited by PSC and we're held accountable for how we operate, source, and package our products.

Made for my pets Dedicated to yours

When you give your pet Austin and Kat, you're not just giving them any supplement — you're giving them something I've personally obsessed over. As a former ironman athlete and race director - the source, quality, and ratio of ingredients in my supplements had a huge impact on my quality of life. I've brought that same mindset to everything we make today at our Seattle Makery™, and the results speak for themselves.

Learn Our Story

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We make everything ourselves in small batches, so your recurring order helps us plan production, ensure we've got the right ingredients on hand, and reduce waste. As a special way to say thanks, subscribers earn special discounts on products + freebies along the way, including awesome collectibles. Join the program today!

FAQs About This Formula

Harper, the English cream lab - she came to Kat as a puppy and inspired the desire for mushroom-based immune support for growing pups!

Nope! We opt for intentional ingredients and never use fillers or other unwanted nasties. Every powder is made up of 100% active ingredients from the very best botanicals and adaptogens we can find.

Please do! We designed these formulas to not only be compatible with our CBD formulas, but to elevate them with a combination of synergistic building blocks and botanical antioxidants that complement each targeted effect.

Be sure to reseal the package and store in a cool, dry place.

Health supplement powders are best used within 90 days of opening. Before opening, the expiration date can be found next to the lot code on the back of the packaging.

Recycling: These items are made of recycled materials and have reached the end of their life

All of our formulas are made with love, 100% by us. We do everything in small batches at our own Seattle MAKERY, and unlike most companies, we source all our own ingredients from start to finish.

You bet! We spare no expense when it comes to quality assurance and our commitment to small batch manufacturing truly separates us from the pack.

We follow a strict set of criteria to ensure that every ingredient is top quality with consistent purity and potency, testing for impurities and contaminants at multiple points along the way. It takes extra time and effort as our process starts well before the day of manufacturing, but every step is well worth it and gives us the confidence that we are delivering our best.

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