Serving guide for USDA Organic Probiotics with Prebiotics
Dog weight Daily serving Supply
5-15 lbs ½ scoop daily 60-day supply
16-60 lbs 1 scoop daily 30-day supply
61+ lbs 2 scoops daily 20-day supply
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    Fera Pets Probiotics + Prebiotics powder jar for dogs and cats, shown with the included scoop
  • An informational graphic for Fera's probiotics and prebiotics, featuring a brown background with white text and icons detailing benefits for gut health, immune health, energy, and skin & coat. A vertical clear tube filled with beige granular powder is shown on the right.
  • Graphic detailing what's inside Fera's Probiotics + Prebiotics, including 12 strains of good bacteria, with no fillers, grains, or artificial ingredients
  • Serving guide chart for Fera's Probiotics + Prebiotics showing daily scoop amounts by pet weight, from a half scoop for small pets up to two scoops for large dogs
  • Chart comparing Fera's Probiotics + Prebiotics to a leading competitor on CFU count, USDA organic certification, and prebiotic content
  • Nutritional label with guaranteed analysis and inactive ingredients on a brown background
  • Back label of the Fera Probiotics + Prebiotics jar showing the full ingredient list and feeding directions by weight
  • Back label of the Fera Probiotics + Prebiotics jar showing the guaranteed analysis, ingredient list, and manufacturer contact information

For Cats + Dogs

USDA Organic Probiotics with Prebiotics

4.9 out of 5.0 stars

683 Reviews

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Sensitive tummies, loose stools, gas, low energy. It's hard to watch our pets deal with occasional digestive discomfort.

Fera’s Probiotics + Prebiotics was created to keep your pet's digestive system humming along perfectly. 

  • 5 billion CFUs from 12 probiotic strains in every scoop
  • Organic prebiotics (FOS, inulin and acacia) to feed the good bacteria
  • Flavorless powder that mixes into food, for dogs and cats
  • USDA Organic, third-party tested and NASC certified
Purchase Options

Purchase options

Pairs well with:

Probiotics are beneficial microorganisms that help maintain proper gut flora and aid in reducing occasional loose stools due to environmental stress or changes in diet.

Dr. Dulake custom-picked 12 living strains at 5 billion CFUs per scoop to support your pet’s digestive health. We paired them with organic prebiotics that support normal intestinal flora balance and the growth of beneficial bacteria in your pet’s intestines.

Best of all, this flavorless powder mixes right into your pet’s food.

  • Gut health: Promotes a healthy intestinal tract, digestion and normal stools.
  • Immune support: 12 strains of good bacteria support a healthy microbiome and normal immune function.
  • Energy: Increases gut flora for an energy boost.

Details for USDA Organic Probiotics with Prebiotics

Not all strains are created equal. When it came time to formulate our probiotics, Dr. Dulake made sure each strain held a specific function and when combined, worked in conjunction to enhance your pet's digestive health.

Saccharomyces boulardii helps support a calm, balanced digestive environment and promotes your pet's normal resistance to pathogens. Bifidobacterium infantis breaks down complex carbohydrates that gut cells are unable to digest.

Fera Pets vs. leading competitor comparison chart for probiotics. USDA Organic: Fera yes, competitor no. CFUs per serving: Fera 5 billion, competitor 100 million. No fillers: Fera yes, competitor no. Multiple strains: Fera yes, competitor no. Cost per serving: Fera $0.42, competitor $1.03. Prebiotics: Fera yes, competitor no.
USDA Organic Probiotics with Prebiotics compared with a leading competitor
Claim Fera Leading competitor
USDA organic Yes No
CFUs per serving 5 billion 100 million
No fillers Yes No
Multiple strains Yes No
Cost per serving $0.42 $1.03
Prebiotics Yes No

12 strains of good bacteria (5 billion CFUs per scoop)

  • Lactobacillus acidophilus
  • Lactobacillus casei
  • Saccharomyces boulardii
  • Lactobacillus plantarum
  • Bifidobacterium infantis
  • Lactobacillus bulgaricus
  • Bifidobacterium bifidum
  • Bifidobacterium longum
  • Enterococcus faecium
  • Bacillus coagulans
  • Lactobacillus brevis
  • Streptococcus thermophilus

Prebiotics

  • FOS (fructooligosaccharides)
  • Organic Inulin derived from Agave
  • Organic Acacia

Learn how to Vet the Label with Dr. Michelle when looking for a probiotic pet supplement.

Strain diversity – More probiotic strains mean broader digestive and immune support. It’s actually more important than total CFU count. A higher CFU count is not always better.

Clean ingredients – Avoid fillers and additives. Look for products that are USDA Organic certified.

Prebiotics– These feed the good bacteria and make probiotics more effective.

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Furry Testimonials

Her poops started having more consistency and she also started looking way healthier and started gaining more weight!

She used to have accidents very often and her poops were very runny, I tried different types of food and nothing would work, until I came across this prebiotics, after a week, her poops started having more consistency and she also started looking way healthier and started gaining more weight, after 2 or 3 weeks her poops started to look normal and no more accidents! Also her coat its so soft! And am just so happy I don't have to keep shampooing my carpet... buy it!!

- Meli

Disclaimer: Customer reviews are provided for informational purposes only and reflect individual experiences. Results may vary from pet to pet.

Serving guide for USDA Organic Probiotics with Prebiotics
Dog weight Daily serving Supply
5-15 lbs ½ scoop daily 60-day supply
16-60 lbs 1 scoop daily 30-day supply
61+ lbs 2 scoops daily 20-day supply

Serving Guide

Feed orally by adding the recommended amount to your pet’s food with the included scoop. This flavorless powder easily mixes into their meal — they won’t even know it’s there. 

The scoop is equivalent to ½ teaspoon.

USDA Organic Probiotics with Prebiotics serving guide showing dog weight, daily serving, and supply time

Frequently Asked Questions

The scoop is 1.2 grams or 2.5cc, which is equivalent to ½ teaspoon.

Each jar has 60 scoops. At the daily serving, that’s about 120 days for pets 5–15 lbs, 60 days for pets 16–60 lbs and 30 days for pets over 60 lbs.

All of FERA's products are manufactured in the USA. It is manufactured in an FDA-registered GMP-compliant facility, third-party tested, and NASC certified.

Yes. Our veterinarian, Dr. Dulake, handpicked each of the 12 strains for both cats and dogs and chose a broad-spectrum blend to help bring balance to the gut microbiome. We also include prebiotics, non-digestible fibers that feed the beneficial bacteria, which many other probiotics leave out.

The probiotic container is normally about half filled. We provide a longer handle scoop and wide rim bottle for ease of scooping, which requires a larger bottle. Each jar contains 60 servings (for example, a pet that weighs 16–60 lbs will have 60 days’ worth).

If your pet was having normal stools prior to use, we ask that you stop using the probiotics and wait one week before reintroducing it. We always recommend starting at HALF the recommended dose. So if your pet is supposed to receive 1 scoop daily, please start at 1/2 scoop for a few weeks. We do recommend only introducing one supplement/treat at a time so we are not confused about what could be causing any diarrhea. We also recommend giving our Probiotics for 4-6 weeks to allow the GOOD bacteria to inhabit the gut and see positive results.

Our USDA Organic Probiotics with Prebiotics powder is flavorless and can easily be mixed in with your pets food.

Our USDA Organic Probiotics with Prebiotics does not need to be refrigerated as long as they are stored in a cool (below 72 degrees), dry place. You are definitely welcome to refrigerate it if the storage conditions fluctuate as this will help maintain their potency.

Yes, it can be mixed with water. We recommend room temperature or cold water to maintain potency of the living beneficial bacteria. Please do not use warm or hot water.

During production, we add a surplus/overage of the amount of LIVING bacteria in our Probiotic powder to account for the natural decline in numbers secondary to transit, storage, and stomach acid. Keeping the probiotics in a cool, dry place (< 72 degrees) to maintain good stability is recommended and can be refrigerated to preserve potency if humidity and heat is an issue.

Itching has many causes. Our formula supports gut health, and since a large part of the immune system originates in the gut, this can help support overall immune system function. It is not a substitute for veterinary diagnosis. If itching persists or worsens, talk to your vet to identify the underlying cause.

Our containers are BPA free, FDA compliant, recyclable, and safe for food contact.

A: No, the formula has not changed since August 2025. Your pet is still receiving the same trusted probiotic and prebiotic blend with 5 billion CFUs and 12 beneficial strains per scoop. We recently updated the label format for clarity, but the ingredients and formulation remain exactly the same.

Give it 4–6 weeks of daily use for the good bacteria to settle into your pet’s gut.

Yes, this product is suitable for dogs and cats 8 weeks of age and older, including seniors. As with any new supplement, we recommend checking with your veterinarian first if your pet has a health condition or is taking any medications.

Some supplement ingredients can interact with certain medications. The prebiotic fiber in this product may delay the absorption of drugs taken at the same time, so we suggest giving it at a different time of day than your pet’s medication. We always recommend checking with your veterinarian before giving this product to a pet who is on medication or a prescription diet, since they know your pet’s full health history.

4.9
Rated 4.9 out of 5 stars
Based on 683 reviews
98%would recommend these products
683 reviews
  • Krystle W.
    Verified Buyer
    Reviewing
    USDA Organic Probiotics with Prebiotics
    I recommend this product
    Pet Type? Cat
    Pet's Age? Senior
    Rated 5 out of 5 stars
    2 weeks ago
    The Best!

    I have used this for all of my cats for years now! They love the taste and I know I am giving them quality gut health support.

  • Jennifer K.
    Verified Buyer
    Reviewing
    USDA Organic Probiotics with Prebiotics
    I recommend this product
    Pet Type? Dog
    Pet's Age? Adult
    Rated 5 out of 5 stars
    2 weeks ago
    Keeping my dogs healthy with Fera Probiotics/Prebiotics

    Review of product for Probiotic/prebiotic

    I am so happy to say all my dogs use the Probiotic/prebiotic product in their morning food without any issues. There were others that they would not eat in their food because of the taste but this product they gobble up. Love giving them extra to protect their health.

  • Alekzandra L.
    Verified Buyer
    Reviewing
    USDA Organic Probiotics with Prebiotics
    I recommend this product
    Pet Type? Dog
    Pet's Age? Adult
    Rated 5 out of 5 stars
    3 weeks ago
    Finally some hope

    My 7 year old Panda Shepherd has been suffering with terrible skin problems for a long time but they've been getting worse as he gets older. I've tried just about every diet and topical treatments with varied results, but without fail his itching and scabs come back. I found this product after some desperate googling and it was something I'd never tried so I went for it. I appreciate that they are upfront about it taking some time to show results, so he is definitely not out of the woods yet, but I have hope. I also love all the opportunities for rewards through their website. Below is my boy at his healthiest and fingers and paws crossed we'll get back there!

  • Christina N.
    Verified Buyer
    Reviewing
    USDA Organic Probiotics with Prebiotics
    I recommend this product
    Pet Type? Dog
    Pet's Age? Senior
    Rated 5 out of 5 stars
    4 weeks ago
    Great product

    I wish there was a larger size but these probiotics are very well tolerated by all 3 of my dogs. I also tried the dental powder recently and my vet described my 9.5 year old dogs teeth as “sparkling”

  • Tom S.
    Verified Buyer
    Reviewing
    USDA Organic Probiotics with Prebiotics
    I recommend this product
    Pet Type? Dog
    Pet's Age? Adult
    Rated 5 out of 5 stars
    2 months ago
    Larger Containers please... (:

    I love your entire product line. Is there a chance you can double the sizes?

    Tom Simpson

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    dogsreallyloveus.com website

Disclaimer: Customer reviews are provided for informational purposes only and reflect individual experiences. Results may vary from pet to pet.