The fermented veg, done.
18 organic superfoods, fermented for two weeks and concentrated from 7 1/2 lbs of ingredients. Two-year shelf life, no preservatives.
Formulated with Dr. Ian Billinghurst
Shop by concern · Raw & homemade feeders
From the vet who started raw.
You already ferment, steam or purée. Dr. Billinghurst made the teaspoon version.
- 14,500+ Happy Customers
- Formulated by the vet who started raw
- 18 fermented superfoods
From our blog: Raw Feeders: Why Gut Support Belongs in the Rotation →
You do the work. We see it.
The freezer full of portioned meat. The Sunday sauerkraut. The kefir on the counter. You read labels for fun and know exactly what goes in the bowl.
What you don't have is more time. That's who this is for.
Sound familiar?
- Fermenting your own veg
- Buying pumpkin, chicory and psyllium separately
- Juggling three or four powders
- Wanting plants already broken down
Why the plant part matters
Wild canines got their plants from their prey's stomach: broken down, fermented and full of microbes. A bowl of meat, bone and organ often leaves that part out, or depends on homemade ferments that only keep a few weeks. The powders ride alongside the raw you already feed; they never replace the meat, organ and bone.
You already rotate proteins so your dog isn't eating the same thing forever. Different plants feed different microbes, so a plant-side rotation across the year supports a broader, more resilient gut, the same instinct pointed at the microbes.
Fermentation: the one thing missing from a species-appropriate diet.
A species-appropriate bowl gets the meat, bone and organ right. What it almost never has is the fermented plant matter a wild canine got from the stomach of its prey: broken down, teeming with microbes and the compounds they make. Fermentation is how that part gets back in. Two weeks in the crock opens plant cell walls, creates probiotics and postbiotics, and turns 18 whole vegetables, herbs and grasses into something a dog can absorb.
Rob feeds Gus a raw food diet that he's perfected over 25 years, and fermentation is always a small part of his dog's daily bowl. A teaspoon per 20 lb is the whole idea; it never needs to be half the bowl.
Where to start
Your starting point
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Step 1
Boost™
Ground it.
Why it helps here: Wild prey came with fermented plant matter in the stomach. Boost™ is that part of the ancestral bowl: 18 organic superfoods, cabbage, kale, broccoli, dandelion, sunchoke and the rest, fermented for two weeks so a dog can absorb them. It rides alongside the raw you already feed.
The fermented vegetable part of the bowl. 1 tsp per 20 lb.
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Step 2 · with Boost™
Fiber & Fortifier™
Work the soil.
Why it helps here: Raw and homemade bowls are often low on fiber. Thirteen organic whole foods, pumpkin, apple fiber and chicory root among them, add it back with a dose you can tune, and replace the pumpkin, psyllium and chopping.
1 tsp to 1 tbsp per 20 lb, alongside Boost™.
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After 90 days
Sustain™ + Fiber & Fortifier™
Why it helps here: The everyday fermented blend keeps the plant side going at the everyday price. Add Youthful Grasses & Sprouts™ for the greens a prey diet would have carried.
Add Youthful Grasses & Sprouts™ for more variety.
See Sustain™ →
What to expect over 90 days
Every dog is different. If you see blood in the stool, stop and call your vet.
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Weeks 1–2 · Ease in.
A quarter dose over the raw you already feed, building to the full teaspoon per 20 lb. Nothing else in the bowl changes.
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Weeks 3–6 · Boost™ + Fiber & Fortifier™.
Full dose, and Fiber & Fortifier™ goes in for the fiber side. Stool is usually the first thing raw feeders notice: firmer, smaller, easier.
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Weeks 7–12 · The plant side settles in.
With fermented plants and whole-food fiber in every bowl, the gut gets the variety a prey diet carried. Owners watching coat and energy tend to see change over months, not days.
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Day 90 · Look back, then decide.
Compare with week one. Many raw feeders move to Sustain™ with Fiber & Fortifier™, and add Youthful Grasses & Sprouts™ for the greens.
Real dogs, real results
How it's helped other dogs
Reviews from owners who started where you are, straight from our review app. We've opened it on this concern; pick All to read everything.
Browse by topic
No reviews on this one yet.
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Coat
Lindsay "It's been life changing"
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Itching
Diana "Healthy gut microbiome equals healthy skin microbiome"
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Poop Eating
Veronica "Her poop eating has definitely decreased"
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Energy Levels
Becky "Her energy levels are crazy!"
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energy levels
Tracey "He was happier, his entire demenour changed"
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Stool Quality
David "I immediately noticed stronger consistency with stool quality"
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Stool Quality
Dana "His poop is consistently good"
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Grass Eating
Emma "She hasn't eaten grass in months now"
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Grass Eating
Lauren "I gave it a week and they stopped eating grass"
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Itching
Theresa "She's not scratching anymore!"
Formulated with Dr. Ian Billinghurst, B.V.Sc.Veterinary surgeon · Creator of the B.A.R.F. diet · Author of four books on natural pet nutrition
Why 90 days? You already know a bowl changes slowly. The plant side is no different: give the gut a season with fermented plants in it before you judge.
14,500+ Happy Customers
Turn your raw-fed dog's gut around
Your dog's 90-Day Gut Reset
Boost™ sized to your dog's weight, delivered every 90 days.
- 18 Fermented Superfoods
- 100-Day Guarantee
Tell us the weight and we'll send the right number of 7.5 oz bags of Boost™ for 90 days, every 90 days: the fermented plant part of the bowl, done. Add Fiber & Fortifier™ for the fiber side.
We ask for 90 consistent days before you judge it. If you're not willing to give it 90 days, this may not be right for you.
GutAbles® treats
Reward them, and treat their gut between meals.
Every reward is a chance to keep the gut going. GutAbles® are one animal protein, a blend of Gussy's Gut® fermented organic superfoods and organic Manuka honey, dehydrated and never cooked, baked or extruded.
They work alongside the powder in the bowl, so the gut support carries on between meals, one treat at a time.
- Dehydrated, never baked
- One protein + fermented superfoods
- Organic Manuka honey
- For dogs
Awarded the 2025/2026 Treat List by Susan Thixton. See the list
How Gussy's helps
The science, in plain words
Fiber and nutrients, no premix.
For raw and homemade feeders, Fiber & Fortifier brings a wide spectrum of vitamins, minerals, and phytonutrients to the bowl, all from organic whole-food sources. No synthetic premix required.
Fewer jars on the counter.
One scoop replaces pumpkin, apple pectin fiber, chicory root and psyllium.
Read the research
These studies explain the mechanisms. None of them tested Gussy's Gut® products.
Our Chief Veterinary Advisor & Formulator
Dr. Ian Billinghurst
“This is my done-for-you supplement to add to your Raw & Homemade dog food — minus the prep work and the guesswork.”
Dr. Ian Billinghurst, Chief Veterinary Advisor & Formulator
This is the single most important upgrade to dog food in over 25 years.
Dr. Ian Billinghurst, Chief Veterinary Advisor & Formulator
- Veterinary surgeon
- Creator of the B.A.R.F. diet
- Author of four books on natural pet nutrition
- Founder of the Billinghurst Institute
- Decades of species-appropriate nutrition work
Dr. Ian Billinghurst created the B.A.R.F. diet and wrote four books on natural pet nutrition. Raw feeders have trusted his work for decades. He formulated these for you.
Meet Dr. Billinghurst →Questions
Common questions
I already ferment my own vegetables. Why switch?
Time and variety. Getting 18 organic superfoods into one ferment is a lot of shopping and chopping, and home ferments don't keep long. Boost™ keeps for two years in the pantry.
Where does it fit in my ratios?
Use it as the fermented vegetable part of the bowl. It's concentrated: one ounce comes from one pound of fresh ingredients.
Is there a synthetic vitamin premix?
No. Every nutrient comes from organic whole foods.
Gently cooked or kibble too?
Yes. It goes over any food. Just don't cook the powder.
How do I give it?
Mix about 1 teaspoon per 20 lb of body weight into your dog's food with a splash of water, once a day. Never serve the powder dry. Start with a quarter of the dose and build up over one to two weeks. Don't cook it; heat breaks down what fermentation built.
What if my dog won't eat it?
Stir it into something they love with a strong smell, like fish oil, tuna water, plain yogurt, kefir or coconut milk. If they still won't eat it, the 30-Day Taste Guarantee covers your first pack (see below).
What's the 30-Day Taste Guarantee?
If you're a new customer and your dog won't eat it, the first package you buy of any product gets a no-questions-asked refund, including shipping. Return it within 30 days of delivery with at least 50% still in the package. If your first order has more than one pack, only one pack can be returned, so we suggest starting with one.
Read the full guarantee →
Let Dr. B do the chopping.
Boost™ plus Fiber & Fortifier™, sized to your dog for 90 days.
