Rx Vitamins Rx Edible Clay Powder - Anti Diarrhea for Dogs & Cats and Promotes Gas Relief for Dogs - Aids in Cat Digestive Support and Dog Constipation Relief - 3.52 oz Review
By Marcus Bell · Dog nutrition editor · Published 2026-05-20 · Updated 2026-06-22
4.5(183)Amazon rating$24.391,000+ bought last month
Our verdict
Rx Vitamins Edible Clay Powder is a straightforward clay-based powder aimed at loose stool, gas, and constipation in dogs and cats, and its 4.5 star average across 183 reviews suggests it works well as an occasional digestive aid.
Dogs with occasional loose stool, gas, or mild constipation who need a simple powder supplement mixed into food.
Skip if
Your dog has ongoing or severe digestive symptoms, since persistent issues call for a vet visit rather than a clay powder.
Form Powder
Best for Digestive Support
Our scorecard
4.4/5overall
Owner rating4.5/5
4.5 average across 183 owner ratings
Popularity1.4/5
183 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog food and health supplements we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["This 3.52 oz powder from Rx Vitamins is built around edible clay, marketed to help firm up loose stool while also easing gas and constipation in both dogs and cats. It's labeled as digestive support rather than a daily probiotic, so it's positioned more as a targeted aid for specific digestive hiccups.", "Because it's a powder, it mixes easily into wet or dry food, which makes dosing simple for most owners without pills or chews to hide. The dual cat-and-dog labeling also means one container can serve a multi-pet household.", 'At $24.39 for 3.52 oz, it sits at the pricier end for a powder supplement of this size, though its 4.5 star rating and Best Sellers Rank of #55 in Dog Digestive Remedies point to a loyal following among owners dealing with digestive upset.']
Pros
Powder form mixes easily into food for simple dosing
Works for both dogs and cats, useful in multi-pet homes
Addresses three common issues at once: diarrhea, gas, and constipation
Strong 4.5 star rating across 183 reviews
Cons
Smaller 3.52 oz size means it may not last long in larger households
Higher price per ounce than many powder digestive aids
Meant for occasional digestive support, not a daily probiotic replacement
Specifications
Form
Powder
Best for
Digestive Support
Performance notes
As a powder rather than a chew or paste, dosing depends on measuring by scoop or spoon into food, which gives more flexibility for smaller dogs and cats than fixed-size chews. The clay-based formula is aimed at binding and firming loose stool rather than seeding gut bacteria the way a standard probiotic does, so it fills a different role than daily digestive chews.
What buyers say
With 183 reviews averaging 4.5 stars and around 1,000 bought in the past month, this is a smaller-volume product with a solidly positive track record rather than a mass-market bestseller.
Yes, the label lists both cats and dogs as target species, so the same powder can be used across a multi-pet household.
Is this meant to be used every day?
It's positioned as digestive support for issues like diarrhea, gas, and constipation rather than a daily maintenance probiotic, so many owners reach for it when symptoms show up. For ongoing or severe digestive problems, check with your vet.
How is this powder given to a dog?
It's a powder meant to be mixed into food, which makes it easy to dose without pills or a specific chew shape your dog has to accept.
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