Whisker Litter-Robot 4 LitterHopper Cat Litter Refill System, Black

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$99.00 Chewy Price
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In Stock
FREE delivery
Arrives between Jan 25 and Jan 31
Free 365-day returns

Pay in 4 interest-free payments of $24.75. .

About This Item

At a Glance

  • Clumping
  • Assembly Required
  • Made in USA
  • All Lifestages

Details

  • Automatically dispenses litter into the globe as needed.
  • Maintains the recommended litter bed level.
  • Can hold up to 13 cups of litter.
  • Requires installation.
  • Includes a new bonnet (Litter-Robot 4 sold separately).

Instructions

Learn More About Whisker From Our Team of Experts

Frequently bought together

Questions & Answers

1 Customer Questions

Can this litter hopper go on the litter robot 3?

Answer by Chewy • Jan 05, 2026
The Whisker Litter-Robot 4 LitterHopper Cat Litter Refill System is intended for the Litter Robot 4.
Reviews
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4.4
Rated 4.4 out of 5 stars
64 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Durability

82% Positive

Ease of Cleaning

82% Positive

Odor Control

79% Positive

Size and Capacity

86% Positive

28 Customer Reviews

Rated 4 out of 5 stars
By Eric on Dec 8, 2025

Very nice! Very good product!

Not when it comes to the app, it won’t allow you to just turn the setting for when it is full, and not have to listen to the alarm. I’m telling you that it finished

Not when it comes to the app, it won’t allow you to just turn the setting for when it is full, and not have to listen to the alarm. I’m telling you that it finished recycling. It was doing at five times in the middle of the nightthroughout the night., so it became annoying, especially when you’re being told at five in the morning it recycled so if you can make it to where you just hear the alarm when it is full, that would be excellent!!! Then I would give it a five star rating!

Rated 1 out of 5 stars
By Danny on Jan 4, 2026

Motor constantly disconnecting

I’ve been trouble shooting for days. It will work fine for maybe two cycles and then the motor will disconnect again. I’ve cleaned every nook and cranny in that

I’ve been trouble shooting for days. It will work fine for maybe two cycles and then the motor will disconnect again. I’ve cleaned every nook and cranny in that thing and it still constantly says it’s been disconnected. I spent way too much money on this for it to not work.

Rated 5 out of 5 stars
By Cyndi on Dec 9, 2025

The litter hopper is a must have with 4 cats!

This is a game changer. I'm able to leave my furry babies to their business without worrying about anything. I only wish I had bought a litter robot with the litter

This is a game changer. I'm able to leave my furry babies to their business without worrying about anything. I only wish I had bought a litter robot with the litter hopper to begin with. I'm not sure what to do with the original huge part of the dome. It was easy to install and easy to use!

Rated 1 out of 5 stars
By Damon on Oct 3, 2025

Litter Hopper is always malfunctioning

According to the instructions, the litter hopper should be adding or not adding according to how much litter is in the box. This one goes off every time one of the

According to the instructions, the litter hopper should be adding or not adding according to how much litter is in the box. This one goes off every time one of the cats is in there and puts the same amount every time so when the next cat goes, there is too much litter and a bunch ends up in the bottom tray. The litter hopper will be empty in half a day and then will error out. I have to completely disassemble the unit, vacuum where it connects and the rubber flab inside the hopper, reassemble and fill up before the error will clear and come back on. In a half day, back to error mode. I will be contacting Chewy today to return it. What a waste of money. The litter box itself seems great.

Rated 5 out of 5 stars
By Luz on Jan 5, 2026

Super easy to setup

Super easy to setup and get working! One additional thing I don’t have to worry about whenever I go away for a few days

Super easy to setup and get working! One additional thing I don’t have to worry about whenever I go away for a few days

Rated 5 out of 5 stars
By Allison on Oct 14, 2025

Litter hopper

i decided to splurge and purchase the litter hopper n i’m so grateful i did. This item is GREAT!! It adds the litter when the litter robot 4 is running low n having

i decided to splurge and purchase the litter hopper n i’m so grateful i did. This item is GREAT!! It adds the litter when the litter robot 4 is running low n having 3 cats it seems to always be running low. I def feel that if you have more than 1 cat this is a necessity with the litter robot 4. Def a great purchase!!

Rated 5 out of 5 stars
By Donna on Jan 10, 2026

Super Scooper!

This little item sure helps out. Adding litter to the robot while we are away on a cruise!

This little item sure helps out. Adding litter to the robot while we are away on a cruise!

Rated 5 out of 5 stars
By Ashley on Sep 6, 2025

Excellent idea that should come standard with LR4!

One of the greatest gifts I gave myself this year was a Litter Robot 4. The second best gift? The LR hopper. It's SO much easier to keep the LR full and a lot easier

One of the greatest gifts I gave myself this year was a Litter Robot 4. The second best gift? The LR hopper. It's SO much easier to keep the LR full and a lot easier and neater to fill the hopper over the globe. I'm not constantly wasting litter any longer by overfilling and I'm saving money in the long run because of it! Of course, the boys only cared about the box it came in - but for their humans? This is a must!

Rated 5 out of 5 stars
By Deborah on Aug 25, 2025

Robot litter box

This the second one I’ve purchased. I had the litter box 3 it was a little small for my big boy. Also the litter would stick to the bottom of the bed both of my

This the second one I’ve purchased. I had the litter box 3 it was a little small for my big boy. Also the litter would stick to the bottom of the bed both of my cats drink a lot of water so it wouldn’t clump together. I was told that a litter box 4 would be better because the bottom actually helps dump the litter out. #4 robot works great no problems so far.

Rated 5 out of 5 stars
By Darrell on Dec 30, 2025

Easy setup and use

Works great, easy to setup and keeps litter at optimal level

Works great, easy to setup and keeps litter at optimal level