Why I compared these two
I looked at Porus One first. It's sold through vets, it comes from Dechra, a veterinary company, and the idea is neat: 500mg of tiny carbon spheres, mixed into food once a day, that Dechra says bind the precursors of uremic toxins in the gut. At $60 to $67 a box it isn't cheap, but a study of it in cats has been published. It went on the shortlist fast.
A friend then sent me HappyWags AIM. It's built around research on a protein called AIM, which helps clear debris from the kidneys. A 2016 paper from Dr. Toru Miyazaki's team found that cat AIM stays stuck to an antibody and struggles to do that job. HappyWags says its bonito powder, with L-Cystine, L-Methionine, Taurine, Astragalus Root Extract and Yeast Beta-Glucans, supports that clean-up process. I wanted to know which of the two I'd keep paying for over years.
I'm a cat owner with no lab. I read both labels and both sets of directions, then fed each product on its own for a stretch, with Maple on wet food and Otis on kibble. Nothing here measures kidney function.
At a glance: HappyWags AIM vs. Porus One
What each brand publishes, in one table. The cats get their say after.
| Spec | AIM | Porus One |
|---|---|---|
| Cost per day, 7 to 16 lb cat | $1.17 on refills, $1.43 one-time | $2.01 on repeat autoship, $2.24 one-time |
| Active ingredients | L-Cystine, L-Methionine, Taurine, Astragalus Root Extract, Yeast Beta-Glucans | Renaltec™ only |
| Amount per dose | 300mg amino acids plus 100mg astragalus and beta-glucans, per 2g scoop | 500mg per packet |
| How the brand says it works | Feeds the kidney's clean-up process | Binds toxin precursors in the gut |
| Taste | Freeze-dried bonito base | Taste and scent neutral |
| Foods it goes on | Wet food, kibble or raw | Wet food, or a moist carrier for kibble eaters |
| Dose by weight | Half, 1 or 2 scoops | 1 packet at any weight |
| Supply | 30 scoops, a month at 1 scoop a day | 30 packets, a month |
| Published study of the product | None I could find | 2024 paper, 13 cats |
| Where you buy it | happywags.co only | Vets and US pet pharmacies, no prescription |
| Money-back guarantee | 60 days, with conditions | None I could find from Dechra |
Green marks the better pick where a number or a plain fact decides it. No green means a tie or your call.
What's in the tub and the packet
I read both labels before either cat tasted anything. These are two very different products sold for the same reason.
- Five named actives per 2g scoop: L-Cystine 150mg, L-Methionine 100mg, Taurine 50mg, Astragalus Root Extract 50mg, Yeast Beta-Glucans 50mg
- That's 300mg of amino acids a scoop, which HappyWags says is what the kidney's clean-up process runs on
- Freeze-dried bonito, wild-caught and sourced from Japan, is the base and the reason it smells like a treat
- No proprietary blends. All five actives have their amounts on the label
- Vet-formulated, made in the USA and third-party tested, by HappyWags' account, with no fillers or artificial flavoring
- The 50mg of taurine means I could stop buying a separate taurine powder
- One ingredient: Renaltec™, 500mg a packet
- Renaltec is tiny carbon spheres, 0.1 to 0.3mm across, that stay in the gut and trap small molecules
- Dechra says they bind the precursors of uremic toxins (indole, phenol, p-cresol) in the intestine
- It isn't absorbed. It leaves in the stool about 12 to 36 hours later, so nothing builds up in the cat
- No preservatives or additives, and Dechra says the pores are too small to trap vitamins
- It adds no nutrients. If you want taurine or amino acids, that's a second product
Dechra's one-ingredient label is the cleanest thing I've read on a cat product, and I respect that. A carbon sphere does its job and leaves, though, and adds nothing to the diet. AIM's five actives are nutrients with the doses printed, and the taurine saved me a second purchase. If I could only have one on the counter, I want the one feeding the cat. HappyWags AIM takes the round, narrowly. Its case for those amino acids rests on the brand's own reading of the research, which I get to below.
Will your cat eat it?
A supplement does nothing in the tub. Maple refuses most powders and Otis only eats kibble, so this round got the most attention in my house.
- Freeze-dried bonito on top of dinner, and Maple was at the bowl before I'd put the scoop down
- It goes on wet food, dry kibble or a raw meal, so I didn't have to change what either cat eats
- Otis eats kibble. One scoop went straight on with no extra step
- HappyWags says cats take it for a new treat, and that's close to what I saw on day one
- One reviewer on its page says her picky cat took to it right away
- It smells like fish. In a small kitchen, you will notice
- Taste and scent neutral by design, and Dechra says most cats tolerate it
- Mixed well into wet food, Maple ate her dinner and never noticed it
- The spheres are black, so on pale food you can see them. Mix thoroughly
- Dry-fed cats need a carrier. Dechra suggests a little of something moist your cat loves
- For Otis that meant a wet treat before his kibble, every single day
- A few spheres always cling inside the packet. Dechra says the fill weight allows for that
Both went down, and I can't fault Porus One for a cat on wet food. It's built to disappear into dinner and it did. The gap shows up with kibble. Otis needed a wet treat every day to carry the packet, which is one more thing to buy and one more chance to skip a day. AIM went straight on whatever was in the bowl, and Maple started waiting by it. This round goes to HappyWags AIM.
The research behind each one
I expected the two brands to sound alike here, and they don't. Porus One has a study of the product itself in cats. AIM points to published science on a kidney protein, and I could find no trial of the tub.
- HappyWags cites Dr. Toru Miyazaki's research on AIM, a protein that helps clear dead-cell debris from the kidneys
- His team's 2016 paper found cat AIM binds an antibody, IgM, about 1,000 times more tightly than mouse AIM does
- HappyWags says its amino acids support the process that research describes. The paper's own test used injected AIM protein in mice, so that link is the brand's reasoning
- I couldn't find a published trial of the AIM formula itself
- Its own numbers come from a post-purchase survey of 600 cats, so I left those percentages out
- A 2024 paper in Veterinary Sciences gave Renaltec to 13 lab cats with kidney disease for 56 days
- Blood levels of two uremic toxins averaged lower than on standard care alone, with no adverse effects noted
- At 500mg once a day, the drop was significant at day 28 and no longer significant at day 56
- Twice a day, above the label dose and alongside a diet change, indoxyl sulfate was still significantly lower at day 56
- A small study, not randomized, funded through a university fund backed by a Dechra donation. Ohio State has a further trial listed, and I found no results yet
Round to Porus One, clearly. A small study with a sponsor attached is still a study of the product in cats, and I couldn't find one for AIM. I also found nothing showing that either product slows kidney disease, so please don't read this round that way. If your decision comes down to published data on the exact product, this round is your answer.
The daily routine
Both are once a day, and both have to keep happening for years, so I paid attention to the boring part: the morning feed.
- One scoop on top of breakfast takes about ten seconds, and the scoop comes inside the tub
- Once a day with any meal. HappyWags asks for nothing else
- The dose follows weight: half a scoop under 7 lbs, one scoop at 7 to 16 lbs, two scoops over 17 lbs
- In a two-cat house you measure for each cat, and you remember which one is which
- At one scoop a day a tub lasts a month. Automatic refills turn up on their own and you can cancel any time
- HappyWags says it knows of no interactions. I'd still ask your vet if your cat takes medication
- Tear the packet, pour, mix. Nothing to measure
- One packet a day for every cat. Dechra says the dose stays the same at any body weight
- Sealed packets travel well. A week's worth for the sitter fit in an envelope
- It has to be mixed in so the cat eats the spheres, so it can't just sit on top
- US retailer listings say to give it at least two hours after other oral medications, which takes planning
- Kibble eaters get an extra step before the meal, every day
HappyWags AIM, by a small margin. Porus One's packets are tidier, and I'd pick them for a sitter or a long weekend. Day to day, the scoop was less fuss: one motion, on any food, with no timing to think about. That two-hour gap from other oral medications won't matter to most people, and it matters a lot in a house with a cat on daily pills.
Which cat each one suits
Dechra's own page talks about older cats with impaired kidney function. HappyWags markets AIM as daily nutrition for cats of any age. That's a real difference in who each one is for.
- HappyWags sells it as everyday nutrition, with no diagnosis needed and no age limit
- It's also aimed at energy, coat and immune support, with yeast beta-glucans on the label
- Most reviews on its page talk about energy and vet visits
- Both of mine are healthy, so this is the use I was shopping for
- At about $1.17 a day on refills, I can see keeping it up for a cat's whole life
- If your vet is already watching your cat's kidney values, I found no AIM study in cats like that. Talk to your vet first
- Dechra describes its use in older cats whose kidney function may be impaired
- Its 2024 study was in cats with stage 2 and 3 kidney disease, so there's data close to that situation
- It's sold through vets, so it can sit inside a care plan your vet is already running
- Dechra says it can be given with Catney One, its phosphate binder
- Dechra's FAQ sets no age or sex limit. The US box says safe use in pregnant or breeding cats hasn't been proven
- For a young, healthy cat, about $2 a day for a gut binder is a harder sell
For a cat already under a vet's care for kidney values, Porus One wins this round. It has data in cats like that, and your vet can build it into a plan. Please don't swap a vet's plan for a powder, including this one. For a healthy cat, which is what I have, I'd pick AIM as daily nutrition. If your cat has a diagnosis, start with your vet and ask about Porus One.
Guarantee and where to buy
Close round. HappyWags will refund you, with conditions. I found no guarantee from Dechra, but Porus One is far easier to find.
- HappyWags' refund policy gives a 60-day money-back guarantee, after 60 days of consistent use and a written account of how it went
- It covers up to 3 tubs per household and one refund per customer. On a subscription it covers only your first order, and later charges aren't refundable
- Shipping fees aren't refunded. Unopened tubs can go back within 7 days, with return postage and a $2 restocking fee on you
- HappyWags says to buy only from happywags.co, so no vet shelf or pet store will have it
- Sold by vets and by US pet pharmacies. Jeffers, Medi-Vet and Heartland Vet Supply all listed it at $67.15 when I checked
- Dechra lists it as non-prescription in the US
- I found no money-back guarantee from Dechra. Returns depend on whichever seller you use
- Stock can be patchy. Jeffers showed it out of stock the day I looked
HappyWags AIM edges this one on the guarantee alone. Read the terms, because the banner says 60 days and the policy page adds the conditions: use it every day, write up how it went, and email before the 60 days run out. Porus One's strength is that your vet may already stock it. If you want a guarantee from the maker, only HappyWags publishes one that I could find.
The five-year cost
Both last a month at the usual dose: one scoop a day from a tub, one packet a day from a box. So I charted one 7 to 16 lb cat on automatic delivery, out to year five.
These are today's prices, with shipping left out of both. AIM on automatic refills is $34.95 a tub, about $1.17 a day, which comes to about $2,097 by year five. Porus One at $60.44 a box on repeat autoship, the lowest US price I could confirm, is about $2.01 a day, or about $3,626. That's about $1,530 in AIM's favor for one cat. Two things close the gap. HappyWags' list price is $59.99, and at that price the two cost about the same. And a cat over 17 lbs takes two scoops, so two tubs a month: $59.90 on the two-tub refill, level with Porus One.
Price and value
Both are monthly purchases with no device to buy. These cards list what each price gets you and what to watch for.
- ✅ 1 tub: $42.95, or $34.95 on automatic refills
- ✅ 2 tubs: $36.95 each, or $29.95 each on refills
- ✅ 3 tubs: $29.95 each, or $23.95 each on refills
- ✅ About $1.17 a day at one scoop on one-tub refills, and about $0.80 on three-tub refills
- ✅ 300mg of amino acids a scoop, plus astragalus and yeast beta-glucans, in a bonito base
- ✅ Goes on wet food, kibble or raw, with nothing extra to buy
- ✅ 60-day money-back guarantee, with the conditions in HappyWags' refund policy
- ❌ No published trial of the formula that I could find
- ❌ The dose climbs with weight, and a cat over 17 lbs goes through two tubs a month
- ❌ These are promotional prices. The list price is $59.99
- ❌ Sold only at happywags.co, so your vet won't have it on the shelf
- ❌ About $2.01 to $2.24 a day, and the price stays the same for a cat under 7 lbs
- ✅ Published 2024 study of Renaltec in 13 cats with kidney disease
- ❌ It adds no nutrients: no taurine, no amino acids
- ✅ Single ingredient, free of preservatives and additives
- ✅ The same one packet for every cat, whatever the weight
- ✅ Sold by vets and US pet pharmacies, no prescription needed
- ❌ Kibble eaters need a moist carrier before the meal
- ✅ Taste and scent neutral, so dinner stays as it was
- ❌ I found no money-back guarantee from Dechra
- ✅ Sealed packets are easy to hand to a sitter
- ❌ US retailer listings say to wait at least two hours after other oral medications
AIM costs less for almost every cat: $34.95 a month against $60.44 on automatic delivery, or $42.95 against $67.15 one-time. Porus One earns its price with a published study and a place at your vet's. AIM earns its price with 300mg of amino acids a scoop, a flavor my cats went for and a refund option. If your cat is healthy and you want daily support you can afford for years, I'd get AIM on refills. If your vet is managing your cat's kidney values, ask about Porus One.