DAILY SUPERFOOD POWDER · PUMPKIN
$99.99 a pouch on subscription $139.99$3.33 a day · Free shipping · 90-day money-back guarantee
The only dog supplement you’d give yourself. 17 human-grade actives, one scoop, into the bowl they already eat.
How big is your dog?
WEEK 2: THE POOP. WEEK 6: THE COAT. WEEK 10: THE STAIRS. WEEK 13+: EVERYTHING ELSE.
90 days to try it. Not for your dog? Every dollar back.
JOINT MOBILITY · HIP & JOINT COMFORT · MUSCLE MAINTENANCE
HEALTHY AGING · COGNITIVE FUNCTION · MENTAL SHARPNESS · CELLULAR ENERGY · ANTIOXIDANT DEFENSE
GUT HEALTH · DIGESTIVE SUPPORT · FIRM STOOL QUALITY · URINARY TRACT SUPPORT
SKIN HEALTH · COAT & SHINE · DENTAL HEALTH
IMMUNE SUPPORT · STRESS ADAPTATION
17 actives. Every dose on the label. Nothing hiding in a blend.
| Ingredient | Per scoop |
|---|---|
| Glucosamine HCl | 750 mg |
| Pumpkin Fruit Powder | 700 mg |
| Reishi | 350 mg |
| Lion’s Mane | 350 mg |
| Turkey Tail | 350 mg |
| Organic Blue Agave Inulin | 325 mg |
| Pumpkin Seed | 318 mg |
| Brown Algae (Ascophyllum nodosum) | 300 mg |
| Green-Lipped Mussel | 200 mg |
| Life’s DHA (Algal) | 200 mg |
| ErgoGold Golden Mushroom | 200 mg |
| Acetyl-L-Carnitine | 100 mg |
| Cranberry Extract 4:1 | 100 mg |
| Phosphatidylserine | 30 mg |
| Coenzyme Q10 | 20 mg |
| Biotin | 1,744 mcg |
| ProbioSEB Duo (B. coagulans & B. subtilis) | 3B CFU |
Per scoop, 4,542 mg. Inactive: bamboo leaf extract. Made in the USA. Human grade, clinically backed.
Seventeen jobs. One scoop. Grouped by what you’ll notice first.
Every one mapped to an ingredient on the label.
Once a day, directly onto food, wet or dry.
| Dog | Daily |
|---|---|
| Under 25 lb | ½ scoop |
| 25–50 lb | 1 scoop |
| 50–100 lb | 2 scoops |
| Over 100 lb | 3 scoops |
30 scoops a pouch. Dosed off a 25–50 lb reference dog so the joint numbers hold at every size.
Ships every 30 days. Skip, pause or cancel in two clicks from your account. No call, no chat window, no guilt. Free shipping on every subscription. US only. One-time orders: shipping and taxes at checkout.
YOUR DOG’S DAILY SUPERFOOD POWDER
Do unto dog as you would unto yourself.
Get Rex →VETS MADE THIS · 17 ACTIVE, HUMAN-GRADE INGREDIENTS · THIRD-PARTY TESTED
WHAT TO EXPECT
WEEK 1
Pumpkin flavor, into the bowl they already lick clean. Dinner is exactly the same, except now it’s doing something.
PUMPKIN · THE USUAL BOWL · ONE SCOOP
WEEK 2
The probiotics, pumpkin and agave inulin get to the gut first, because the gut is where the complaints come from. Firmer. More punctual. Less to discuss on the walk.
PROBIOTICS · PUMPKIN · AGAVE INULIN
WEEK 6
Biotin and algal DHA show up in the coat around week six. The question about what you feed them shows up a week after that, usually from someone whose dog is also at the park, also looking.
BIOTIN · ALGAL DHA
WEEK 10
Glucosamine and green-lipped mussel take their time, because joints do. Then one morning the couch is one hop instead of two, the car doesn’t need a lift, and the stairs stop being a negotiation.
GLUCOSAMINE · GREEN-LIPPED MUSSEL
WEEK 13+
This is where the long game lives. Turkey tail, reishi and lion’s mane for the immune system and the mind. Ergothioneine and CoQ10 for the cells and the heart. Acetyl-L-carnitine for the energy that gets them to the park and back. Phosphatidylserine so the trick they learned at two still works at twelve. Cranberry for the one thing nobody wants to talk about. None of it shows. All of it adds up. This is the part they’d thank you for, if they knew, which they don’t, which is the point. If you can’t see it by day ninety, you get your money back.
IMMUNE · HEART · BRAIN · ENERGY · BLADDER · FOR THE YEARS
WHAT’S IN IT
Seventeen Actives. Every Amount On The Label. Sorted By What They Do.
ALL · 17 INGREDIENTS
GLUCOSAMINE HCLFrom Crustacean Shells.
750 MG
The number on the label is the number in the scoop. Glucosamine is the building block of cartilage and the fluid that keeps a joint moving without complaint. Rex doses it at 15–30 mg per pound, which is what a joint supplement is supposed to hit and usually doesn’t.
RESEARCH: CANINE TRIALS SHOW BENEFIT AT 70–90 DAYS OF DAILY USE.
GREEN-LIPPED MUSSELNew Zealand. The Actual Mussel.
200 MG
The ingredient veterinary researchers keep going back to. Omega-3s and glycosaminoglycans in one shellfish, for hips that still clear the couch. In Rex it rides alongside glucosamine rather than carrying the load alone.
RESEARCH: 8-WEEK CANINE RCT, 67% IMPROVED ON VET-RATED MOBILITY VS 27% PLACEBO.
LION’S MANEHericium Erinaceus, Fruiting Body.
350 MG
The mushroom in your smoothie, now in their bowl. Supports the brain’s own maintenance crew, so the trick they learned at two still works at twelve. Fruiting body, not mycelium on grain.
RESEARCH: HERICENONES AND ERINACINES STUDIED FOR NERVE GROWTH FACTOR SUPPORT.
REISHIGanoderma Lucidum.
350 MG
Two thousand years of use, three hundred and fifty milligrams a day. An adaptogen, which is the word for things that help a body stay level when the mailman comes. Supports a steady stress response and immune balance.
RESEARCH: BETA-GLUCANS AND TRITERPENES STUDIED FOR IMMUNE MODULATION.
TURKEY TAILCoriolus Versicolor.
350 MG
The most-studied mushroom on earth, and the one with actual canine research behind it. Beta-glucans that support the immune system’s day-to-day work, at a dose that isn’t decorative.
RESEARCH: PSP FROM TURKEY TAIL STUDIED IN DOGS AT PENN VET.
ERGOGOLD GOLDEN MUSHROOMStandardized For Ergothioneine.
200 MG
Your dog’s cells have a transporter built specifically for ergothioneine, an antioxidant the body can’t make and has to eat. We figured we’d give it something to do. Golden oyster mushroom is the richest known source.
RESEARCH: ERGOTHIONEINE IS CARRIED BY A DEDICATED CELL TRANSPORTER (OCTN1).
PHOSPHATIDYLSERINEBrain Phospholipid, From Soy.
30 MG
A fat that brain cells are made of. Mental sharpness for the dog who still has to find the ball, and then remember why. Supports memory and focus, especially as the muzzle greys.
RESEARCH: PS BLEND IMPROVED SHORT-TERM MEMORY IN AGED BEAGLES AFTER 60 DAYS.
ACETYL-L-CARNITINEAmino Acid Derivative.
100 MG
Moves fuel into the mitochondria, where energy is made. Cellular energy for the second lap around the park nobody asked for, and support for the brain’s energy supply as it ages.
RESEARCH: L-CARNITINE STUDIED IN AGED BEAGLES FOR LEARNING TASK PERFORMANCE.
COENZYME Q10Ubiquinone.
20 MG
The heart’s preferred antioxidant and part of how every cell turns food into power. Levels drop with age. This puts some back. Healthy aging, one beat at a time.
RESEARCH: COQ10 STUDIED FOR MITOCHONDRIAL FUNCTION AND CARDIAC SUPPORT.
PROBIOSEB DUOBacillus Coagulans & Bacillus Subtilis.
3B CFU
Three billion CFU of two spore-forming strains, which means they arrive alive instead of dying politely in the stomach. Supports the gut, which supports most of the immune system, which shows up on the coat. The first thing you’ll notice is on the lawn, and it’s firm.
RESEARCH: SPORE-FORMING STRAINS SURVIVE STOMACH ACID AND MANUFACTURING HEAT.
PUMPKIN FRUIT POWDERCucurbita Pepo.
700 MG
The thing your vet told you to add to the bowl. Already in the bowl. Soluble fiber that gives the gut something to work with, for digestion you can set a watch by.
RESEARCH: SOLUBLE FIBER SUPPORTS STOOL CONSISTENCY AND GUT MOTILITY.
PUMPKIN SEEDCucurbita Pepo, Seed.
318 MG
The other half of the pumpkin, and the half people throw out. Fiber, protein and zinc from the seed, working the same shift as the fruit. Two pumpkins walk into a bowl.
RESEARCH: PUMPKIN SEED PROVIDES INSOLUBLE FIBER, PROTEIN AND ZINC.
ORGANIC BLUE AGAVE INULINAgave Tequilana.
325 MG
A prebiotic fiber that feeds the probiotics so they stay. Digestive support from the plant that also makes tequila. Different part.
RESEARCH: INULIN IS WELL TOLERATED IN DOGS AND FEEDS BENEFICIAL GUT BACTERIA.
CRANBERRY EXTRACT 4:1Vaccinium Macrocarpon, Fruit.
100 MG
Four pounds of fruit per pound of extract. Proanthocyanidins that support a healthy urinary tract, for the one thing nobody at the park wants to discuss.
RESEARCH: CRANBERRY PACS STUDIED FOR BACTERIAL ANTI-ADHESION IN CANINE URINE.
BIOTINVitamin B7.
1,744 MCG
The vitamin that keratin is built from, and keratin is what a coat is. Skin health and coat & shine, in the amount that makes strangers ask what you feed them.
RESEARCH: CANINE BIOTIN STUDIES REPORT COAT IMPROVEMENT WITHIN WEEKS.
ALGAL DHALife’s DHA, From Microalgae.
200 MG
Omega-3 straight from the source the fish get it from. Supports skin, coat and brain without the fish, the smell, or the ocean.
RESEARCH: DHA IS A STRUCTURAL COMPONENT OF BRAIN AND RETINAL TISSUE.
BROWN ALGAEAscophyllum Nodosum, North Atlantic.
300 MG
Dental health from the inside out. A seaweed that works through saliva to make plaque and tartar less inclined to stick. Breath you can be in a car with.
RESEARCH: 90-DAY CANINE RCT, CALCULUS LOWER AT DAY 30, HALITOSIS LOWER AT DAY 60–90.
PER SCOOP, 4,542 MG. NO PROPRIETARY BLENDS. HUMAN GRADE, CLINICALLY BACKED.
WHAT WE REFUSE
Your dog has never read a label and never will. So we read it for them, then kept reading until most of the supplement aisle was out. What’s left is seventeen actives at the amounts printed on the pouch, and a list of things that didn’t make the cut.
THIRD-PARTY TESTED · MADE IN THE USA · HUMAN GRADE, CLINICALLY BACKED
THE SHELF YOU’RE NOT BUYING.
Your dog’s wellness routine should not have eleven lids.
Eleven jars. Eleven subscriptions.
Rex is the whole shelf in a scoop.
Same actives. One pouch. Money left over for the good leash.
| What it covers | Separately | Rex |
|---|---|---|
| Multivitamin | ~$30 | ✓ |
| Probiotic | ~$35 | ✓ |
| Hip & joint chew | ~$35 | ✓ |
| Omega-3 oil | ~$25 | ✓ |
| Functional mushrooms | ~$40 | ✓ |
| Pumpkin / fiber | ~$25 | ✓ |
| Calming chew | ~$30 | ✓ |
| Dental powder | ~$35 | ✓ |
| Cranberry / bladder chew | ~$25 | ✓ |
| Skin & coat chew | ~$25 | ✓ |
| Senior brain support | ~$35 | ✓ |
| Per month | ~$340 | $99.99 |
| Per day, 25–50 lb | ~$11.33 | $3.33 |
CATEGORY PRICES FOR PREMIUM DOG SUPPLEMENTS, OCTOBER 2026, ROUNDED. NO BRANDS NAMED. NONE OF THEM SHARE A SCOOP.
OUR POINT OF VIEW
You take the supplement. You read the label. You skip the slop.
They’d do the same, if they could open the pouch.
Rex is your routine, resized for the bowl.
Week two, on the lawn. Week six, on the coat. Week ten, on the stairs. Week thirteen on, everything else: nothing you can see and everything that matters. Every dog is different. The order isn’t.
Pumpkin flavor, into food they already eat. Most dogs don’t notice it’s there, which is the whole idea. If yours is the exception, mix it into something wet. They’ll come around. They always do.
Other supplements, yes, though most people find it replaces the pile. Medication, ask your vet first. We’d rather lose the sale than guess.
Rex contains green-lipped mussel (shellfish), glucosamine from crustacean shells, and phosphatidylserine from soy. No chicken, beef, grain, corn or dairy. The full panel is under What’s In It.
A soft chew can be mostly binder and flavoring before an active ingredient shows up. Powder is the stuff you’re paying for, and it goes where the food already goes.
Seventeen actives at the amounts printed on the label, in one pouch. Buy them separately and it’s about $340 a month and eleven lids. The Shelf You’re Not Buying is itemized above.
You have ninety days from delivery. If it isn’t right for your dog, for any reason, email us and we refund every dollar you paid, however much of the pouch is left. The only thing it costs you is the email.
NINETY DAYS
Give it ninety days. That’s how long it takes.
Not seeing it? Email us and we refund every dollar.
Worst case, your dog had a very good quarter, on us.
17 ACTIVES · EVERY DOSE ON THE LABEL · FREE SHIPPING ON SUBSCRIPTION
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Occasional emails. Fewer than your dog would send.
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