About oneisall
Oneisall traces back to 2012, when founder Terry rescued an abused border collie named Niuniu who was terrified of pet salons. Grooming her at home meant finding clippers that weren't prohibitively expensive, painfully loud, or ineffective on a matted coat, and not finding a good option led Terry to build one. ONEISALL INC was formally established in 2018, and the company's electric pet clipper, the P2, launched on Amazon that year and reached the top spot on Amazon in both the United States and Germany by 2019. The brand has since expanded from grooming tools into a wider smart pet-care lineup, including automatic feeders, water fountains, self-cleaning litter boxes, and air purifiers, sold in more than 20 countries.
The Oneisall automatic feeder line was reviewed hands-on by Catster's veterinary review team alongside the brand's water fountain and air purifier, with the feeder scoring a full 5 out of 5 stars for quality, design, and ease of setup. In our own testing for this site, the Oneisall two-cat feeder was the highest-rated feeder in the roundup, standing out for a mechanical portion splitter and two separated stainless bowls that solve mealtime food guarding without any app or Wi-Fi dependency.
Brand website: oneisall.com
What oneisall makes
oneisall's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Automatic Feeders
timer-based dry food dispensers, including two-cat splitter models with dual stainless bowls — featured on House of Mittens
Water Fountains
cordless stainless-steel and filterless pet drinking fountains
Automatic Litter Boxes
self-cleaning open-top litter box
Pet Grooming Clippers
cordless, low-noise clippers for cats and dogs, the product line the company was founded on
Pet Grooming Vacuums
vacuum-attachment grooming kits for shedding control
Air Purifiers
HEPA air purifiers marketed for pet dander and hair
Why we recognized oneisall
The House of Mittens Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our vet-reviewed category guides. oneisall earned it on the strength of the products below, evaluated the same way every product on this site is: assessed against feline-health criteria, used with real cats, and judged on merit.
oneisall products we rated highly
oneisall Automatic Cat Feeder for 2 Cats, 20 Cups/5L
In our testing, this earned the highest rating of any feeder in our automatic cat feeder review, holding a 4.6-star average. An even splitter divides each dispensed portion between two separated stainless bowls, which addresses the low-grade food guarding that makes one cat in a pair chronically underweight, and it does it mechanically with no app or Wi-Fi connection to fail. A 5L hopper stretches a long way between refills even feeding two cats, dual power with battery backup covers a blackout, and a twist-lock lid holds up against a cat that tries to headbutt the unit open.
Read the 10 Best Automatic Cat Feeders of 2026 guide →What earned oneisall the recognition
- The oneisall two-cat automatic feeder earned the highest rating of any feeder in our automatic cat feeder review, holding a 4.6-star average across more than 4,000 ratings.
- Its mechanical portion splitter and two separated stainless bowls solve mealtime food guarding between cats without requiring an app or Wi-Fi connection.
- Catster's veterinary review team rated the Oneisall automatic feeder 5 out of 5 stars in hands-on testing, alongside high marks for the brand's water fountain and air purifier.
- Dual power with battery backup keeps the feeding schedule running through a power outage, one of the reliability checks we look for on every feeder we test.
- The company's grooming clippers, its original product line dating to its 2012 founding, reached the top spot on Amazon in the US and Germany by 2019.