---
title: "S Boulardii for Cats — $366K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/s-boulardii-for-cats"
last_updated: "2026-07-21T17:41:43.575Z"
locale: en
meta:
description: "Niche score 54/100 · $366K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $366K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "S Boulardii for Cats — $366K/yr Amazon US Niche (2026) - Flapen"
---
# **s boulardii for cats**
**Worth a look**
Shows low returns (0.0%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 54Growth 41Conversion 81Competition 24Returns 100Price range 95Avg price 95Brand share 0Review moat 43Quality gap 63
**Returns**
**Incredible****0.0%**
return rate — above 6% kills the launch gate
**Avg price**
**Incredible****$33.10**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$18.81–$48.70**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.5%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$366K**
$366K/yr · 129K searches
**Review moat**
**Okay****2,203.8**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+12.8%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, s boulardii for cats is a $366K/yr Amazon United States market (129K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **s boulardii for cats market data**
- **Units sold / yr**
- **10K–13K**
- avg 500–750/product
- **Revenue / yr**
- **$331K–$414K**
- units × avg price
- **Launch success**
- **—**
- 0 of 1 new (360d)
- **Conversion rate**
- **8.5%**
- **Avg BSR**
- **#75**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **93%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **62 months**
- **Avg seller age**
- **163 days**
## **Competition & brand share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▲rising
**Sellers**
**11**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**0%**
- Fera Pets87% - FOUR LEAF ROVER6% - AnimalBiome3% - Nutramax2% - LuxeVib2% - Open — no brand owns it (0%)
## **Demand**
Weekly Amazon search volume, last 24 weeks — +12.8% search growth over the last 90 days.
5K3KSpike '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/pet-supplies/s-boulardii-for-cats/trend)
## **Top s boulardii for cats search terms**
- **fera pets**59K/yr+7.6%6.0% conv. - **fera pets probiotics**22K/yr+23.5%11.5% conv. - **fera**16K/yr+19.8%1.3% conv. - **saccharomyces boulardii for dogs**9K/yr+23.9%2.9% conv. - **four leaf rover probiotic for dogs**5K/yr+23.7%8.4% conv. - **s boulardii for cats**6K/yr-2.8%2.9% conv. - **fera pet**4K/yr+43.4%4.1% conv. - **four leaf rover protect**4K/yr-31.9%16.0% conv. - **fera probiotics for dogs**3K/yr+26.9%11.6% conv. - **fera probiotics for cats**2K/yr-23.5%7.1% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/s-boulardii-for-cats/search-terms)
## **Top s boulardii for cats products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$37K20%$73K30%$110K40%$146K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Fera Pets Organic Probiotics for Dogs & Cats with Prebiotics 60 Scoops**Fera Pets**$27.96**4.4★8,782 rev](https://www.amazon.com/dp/B078955BY2) [2**Fera Pets Probiotics for Dogs with Prebiotics & Postbiotics 90 Chews**Fera Pets**$38.13**4.4★182 rev](https://www.amazon.com/dp/B0F8PDF1GH) [3**Fera Pets Hip & Joint Supplement for Dogs with Glucosamine 90 Soft Chews**Fera Pets**$37.43**4.5★956 rev](https://www.amazon.com/dp/B01MSTKY64) [4**Fera Pets Dog Allergy & Immune Support with Turkey Tail Mushroom 90 Chews**Fera Pets**$38.46**4.2★220 rev](https://www.amazon.com/dp/B0F8PNCDJS) [5**Four Leaf Rover Protect - Probiotics for Dogs - Veterinarian Formulated - with Natural Prebiotics and Antioxidants - Detoxification & Gut Health - 30 Day Large Dog Supply**FOUR LEAF ROVER**$29.18**4.4★593 rev](https://www.amazon.com/dp/B07YN897QP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**S.boulardii + FOS Pet Probiotic Powder for Dogs and Cats 6.7 Billion CFU Gut & Immune Support Loose Stool & Digestive Upset Relief Improves Stool Consistency Skin Health Veterinarian Recommended**LuxeVib**$25.38**6 rev7mo ago](https://www.amazon.com/dp/B0G6YRKB8Z) [**Fera Pets Probiotics for Dogs with Prebiotics & Postbiotics 90 Chews**Fera Pets**$38.13**182 rev1y ago](https://www.amazon.com/dp/B0F8PDF1GH) [**Fera Pets Dog Allergy & Immune Support with Turkey Tail Mushroom 90 Chews**Fera Pets**$38.46**220 rev1y ago](https://www.amazon.com/dp/B0F8PNCDJS) [**Fera Pets Dog Multivitamin Chews with Probiotics 90 Chews**Fera Pets**$38.67**141 rev1y ago](https://www.amazon.com/dp/B0F8PNVMZL) [**Fera Pets Cat Multivitamin - Wellness Blend with Probiotics 60 Scoops**Fera Pets**$29.64**80 rev1y ago](https://www.amazon.com/dp/B0DXLJPGG9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**S.boulardii + FOS Pet Probiotic Powder for Dogs and Cats 6.7 Billion CFU Gut & Immune Support Loose Stool & Digestive Upset Relief Improves Stool Consistency Skin Health Veterinarian Recommended**LuxeVib**$25.38**4.8★**▲ 124%**](https://www.amazon.com/dp/B0G6YRKB8Z) [**Fera Pets Probiotics for Dogs with Prebiotics & Postbiotics 90 Chews**Fera Pets**$38.13**4.4★**▲ 50%**](https://www.amazon.com/dp/B0F8PDF1GH) [**Fera Pets Hip & Joint Supplement for Dogs with Glucosamine 90 Soft Chews**Fera Pets**$37.43**4.5★**▲ 34%**](https://www.amazon.com/dp/B01MSTKY64) [**Nutramax Proviable Probiotics for Dogs and Cats Daily Digestive Health Supplement with Multiple Strains of Bacteria Cat and Dog Probiotics Plus Prebiotics 30 Capsules**Nutramax**$18.81**4.6★**▲ 28%**](https://www.amazon.com/dp/B0050JM626) [**Fera Pets Liquid Fish Oil - Non GMO Omega 3 for Dogs & Cats 16 oz**Fera Pets**$37.11**4.3★**▲ 15%**](https://www.amazon.com/dp/B07K3B5T6W)
**~~View all trending →~~**
## **What buyers say about s boulardii for cats**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Amazing quality”*
**Pet Friendly**14%
*“My dog loves it”*
**Ease Of Use**10%
*“Easy to use”*
**Value For Money**7%
*“price is reasonable”*
**Taste-Overall**7%
*“Our dog loves the taste”*
**Allergies**6%
*“Relief for the itchy dog”*
**Soothing/Teething**5%
*“It helped solve my dogs frequent yeast infections in his toes and ears and he loves the taste”*
**Flavor**3%
*“Dog loves flavor”*
**Ease Of Chewing/Swallowing**3%
*“Excellent Chew”*
**Ingredients-Overall**3%
*“Great ingredients, healthy pet”*
### **What buyers complain about **
**Indigestion**20%
*“He was having issues with his digestive system”*
**Value For Money**12%
*“A little pricey”*
**Functionality-Overall**11%
*“Doesn't work”*
**Smell**11%
*“Awful smell”*
**Allergies**9%
*“itchy skin”*
**Taste-Overall**7%
*“Dog doesn't like the taste”*
**Size-Overall**3%
*“Sometimes it's very loose”*
**Flavor**3%
*“Deceptive about being Flavor/Odorless”*
**Advertised Vs Actual Product**2%
*“It didnt work as advertised”*
**Quality-Overall**2%
*“Concerned about quality”*
### **Top return reasons **
**Taste-Overall**19%
**Indigestion**19%
**Compatibility-Overall**14%
**Functionality-Overall**14%
**Smell**14%
**Escape Proof**14%
**Advertised Vs Actual Product**5%
## **Common questions**
- **Is s boulardii for cats profitable to sell on Amazon United States?**
- The niche generates $366K/yr across 15 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +12.8%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the s boulardii for cats niche?**
- 5 brands and 11 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in s boulardii for cats?**
- Top complaints mined from reviews: Indigestion, Value For Money, Functionality-Overall. The return rate is 0.0%.
- **What does it cost to enter the s boulardii for cats niche?**
- Listings span $18.81–$48.70; the average listing price is $33.10 (sweet spot $15–$100). The average incumbent carries 2,204 reviews — the moat a new listing must climb.
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