Pet messes are wet, they soak below the surface, and they smell. That combination changes what you should buy, and it usually means a smaller machine than you expect.
Everyone in this category says they tested twenty vacuums. We have not tested any, and we say so. What we do instead is read the manuals, compile the published specifications, and work out what each machine costs to run for three years — the method is written out in full.
We earn a commission if you buy through the links on this page, at no extra cost to you. It never changes what we recommend or the order we recommend it in. Full disclosure.
The short answer: the Bissell Little Green Pet Pro 3909. Not because it is the biggest machine — it is one of the smallest — but because pet accidents need dealing with within minutes, and a portable that lives in a cupboard gets used while a 20-pound upright does not. It publishes pet-specific tools and Bissell's strongest suction claim in the portable line.
Speed of deployment beats capacity here
This is the specific thing that makes pet cleaning different from carpet cleaning generally. The window matters. A wet accident treated in the first few minutes comes up; the same accident found the next morning has soaked into the underlay and possibly the subfloor, and no amount of extraction from the surface reaches it.
Which means the machine that wins is the one you can have running in ninety seconds. A 7 lb Bissell Little Green Mini or a 9.4 lb Hoover CleanSlate Plus lives in a cupboard, plugs in, and works. A 20.5 lb Hoover SmartWash Pet has to be fetched, assembled and filled — and by then you have already blotted the mess with a towel and told yourself you will deal with it properly at the weekend.
What actually addresses odor
Three published mechanisms, and they do different things:
Enzyme and oxy formulas. Bissell publishes Pet Pro Oxy Urine Eliminator with the ProHeat 3588F and the Little Green Pet Pro, describing it as removing pet stains and odors rather than masking them. Shark publishes that the CarpetXpert traps and removes odors including pet urine rather than covering them. Both are formula claims, and both formulas are ongoing purchases.
Antimicrobial brushrolls. Hoover publishes an antimicrobial PowerSpin Pet brush roll on the PowerDash and odor-resistant FlexForce brushes on the SmartWash. Bissell publishes antimicrobial brush rolls plus a FreshStart dirt tank on the ProHeat 3588F. These address the machine smelling, not the carpet.
Extraction depth. The mechanism that actually removes the source. Dual brushrolls and a heater — the ProHeat 3588F — reach further into the pile than a single-brush machine.
Only the third of those removes anything. The first two make what remains smell less and stop your machine becoming part of the problem.
#
Product
Best for
Score
Price
01
Bissell Little Green Pet Pro Portable Carpet Cleaner (3909)The Little Green with a bigger tank and Bissell's strongest published suction claim in the portable line.
Bissell ProHeat 2X Revolution Pet Pro Plus (3588F)Dual brushrolls, a heater and an Express mode Bissell rates at about 30 minutes to dry — the only machine here that addresses drying time at all.
Bissell TurboClean PET Upright Carpet & Upholstery Cleaner (3948)The 3952 plus a 7-foot hose and a self-cleanout tool — and the tool is what makes it usable on stairs and a sofa.
Hoover PowerScrub Deluxe Carpet CleanerFive counter-rotating brushes, dual tanks, an 8-foot hose and a two-year warranty — the most complete kit at this price.
Bissell Little Green Mini Portable Carpet Cleaner (4075)7 lb, 16 ounces, and a self-cleaning hose tool — the machine most people should buy before a full-size extractor.
Shark CarpetXpert with Built-in Stain Cleaner (EX151)The only extractor here whose deep-clean claim names its test standard — ASTM F2828 — which is exactly the kind of specificity we reward.
Hoover SmartWash Pet Automatic Carpet CleanerPush to clean, pull to dry, no trigger to hold — and a five-year warranty, which is the longest published on this site by three years.
Scores are ours, from the published rubric on the How We Pick page. They are editorial judgments about published specifications — not test results. We have not handled these machines.
01 · Best portable for pet accidents
Bissell Little Green Pet Pro Portable Carpet Cleaner (3909)
The Little Green with a bigger tank and Bissell's strongest published suction claim in the portable line.
Extra-large clean and dirty tanks — 8 oz formula included
Suction claim
Manufacturer states the strongest suction in its class, versus the leading competition
Tools
Crevice tool, pet hair removal tool, self-cleaning hose tool
Formula
Designed around Triple Action Pet Pro Oxy Spot & Stain with urine eliminator and StainProtect
Power
Corded
Weight
Not published on the listing
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Bigger tanks than the Mini, so a full room of spots is one fill
+Pet-specific tools are in the box rather than sold on
+Self-cleaning hose tool carried over from the Mini
Where it stops
−Bissell does not publish a machine weight or an exact tank volume for this model
−The suction claim is Bissell's own against an unnamed competitor
−Pet formula is the priciest of the Bissell consumables
Who it is for
Homes with a puppy, an old dog, or a cat with opinions.
Skip it if
The messes are dry rather than wet. For tracked-in dirt a vacuum is the tool; extractors are for liquids and set stains.
Our score: 6.6 out of 10
Tank capacity5.5
Brush system4.0
Tools and reach8.5
Weight and handling8.5
Running cost6.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
02 · Best heated cleaner
Bissell ProHeat 2X Revolution Pet Pro Plus (3588F)
Dual brushrolls, a heater and an Express mode Bissell rates at about 30 minutes to dry — the only machine here that addresses drying time at all.
MAX Clean, and Express Clean rated to leave carpets dry in about 30 minutes
Hose
8 feet
Tools
2-in-1 pet upholstery tool and 3" tough stain tool
Pre-treatment
CleanShot pre-treater with OXY, built in
Formulas
Pro Max Clean + Protect and Pet Pro Oxy Urine Eliminator, both included
Machine weight
Not published in a comparable form on the listing
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Dual counter-rotating brushrolls double the agitation of the single-brush machines
+A published drying-time claim, which almost nobody in this category makes
+Built-in pre-treater means you are not carrying a spray bottle around as well
+8-foot hose, the longest here
Where it stops
−Two formulas included means two formulas to keep buying
−The most expensive machine on this page
−Bissell does not publish a comparable machine weight for this model
Who it is for
Households with recurring pet accidents, where the same spots get cleaned repeatedly.
Skip it if
You clean carpets twice a year. This is a machine that repays frequent use; for occasional deep cleans, renting is the better arithmetic.
Our score: 7.6 out of 10
Tank capacity8.5
Brush system9.5
Tools and reach9.0
Weight and handling5.5
Running cost5.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
03 · Best for pet messes
Bissell TurboClean PET Upright Carpet & Upholstery Cleaner (3948)
The 3952 plus a 7-foot hose and a self-cleanout tool — and the tool is what makes it usable on stairs and a sofa.
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+The self-cleanout tool rinses itself in one press, which is the single most annoying job on any extractor
+7-foot hose reaches a full flight of stairs from the landing
+Same 1-gallon tank and 4-row brush as the cheaper 3952
Where it stops
−19.2 lb, nearly three pounds more than the 3952
−Still no heater
−Pet formula costs more per bottle than the standard version
Who it is for
Pet households where the messes are on stairs, sofas and pet beds as much as the floor.
Skip it if
You only ever clean flat open carpet. The hose and tools are the entire price difference and you would never unclip them.
Our score: 7.4 out of 10
Tank capacity8.5
Brush system7.5
Tools and reach8.5
Weight and handling6.0
Running cost6.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
04 · Biggest portable tank
Hoover CleanSlate Plus Portable Spot Cleaner
A 40-ounce clean tank in a 9.4 lb body — more than double the Little Green Mini's capacity for spot work.
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+40 oz clean capacity — a 7" wide tool with the tank to actually feed it
+Two tool widths, so it covers a rug as well as a crevice
+Hose rinse, which is the same smell-prevention idea as Bissell's HydroRinse
Where it stops
−9.4 lb is heavier than the Bissell Little Green Mini for the same category of job
−No powered brush
−Bigger footprint than a Little Green in a cupboard
Who it is for
People who use a spot cleaner often enough to resent a 16-ounce tank.
Skip it if
You want the smallest possible thing that lives under a sink. The Little Green Mini is 2.4 lb lighter and physically smaller.
Our score: 6.7 out of 10
Tank capacity7.0
Brush system4.0
Tools and reach8.0
Weight and handling7.5
Running cost7.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
05 · Most brushes for the money
Hoover PowerScrub Deluxe Carpet Cleaner
Five counter-rotating brushes, dual tanks, an 8-foot hose and a two-year warranty — the most complete kit at this price.
8 feet, with upholstery, pet and crevice tools and a storage bag
Mixing
Auto Mix — meters the water-to-solution ratio automatically
Warranty
2-year limited
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Five brushes attack pile from multiple angles rather than one
+Auto Mix removes the guesswork that wastes formula and leaves residue
+8-foot hose with three tools and a bag to keep them in
+2-year warranty
Where it stops
−18.5 lb and a wide 21.9-inch body — awkward on stairs and in a closet
−Five brushes means five things to clear hair out of
−Hoover formula is a permanent consumable, same as Bissell's
Who it is for
Whole-house carpet plus stairs and upholstery, where one machine has to do everything.
Skip it if
You want the lightest thing that works. This is the most machine on the page and the weight is the price of that.
Our score: 7.8 out of 10
Tank capacity8.5
Brush system9.5
Tools and reach9.0
Weight and handling5.0
Running cost7.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
06 · Best spot cleaner
Bissell Little Green Mini Portable Carpet Cleaner (4075)
7 lb, 16 ounces, and a self-cleaning hose tool — the machine most people should buy before a full-size extractor.
4" tough stain tool with a removable lens, plus the HydroRinse self-cleaning hose tool
Formula
8 oz Bissell Little Green formula included
Power
Corded electric
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+7 lb and stores in a cupboard, so it comes out for a single spill instead of waiting for a deep-clean day
+HydroRinse flushes the hose, which is the thing that makes portable extractors smell
+Handles car interiors, pet beds and upholstery as well as carpet
Where it stops
−16 ounces is a few spots, not a room
−No powered brush — you provide the scrubbing
−It is not a substitute for a full-size machine and does not claim to be
Who it is for
Almost everyone. Most carpet problems are spots, and most people buy a 20-pound machine to deal with them.
Skip it if
You want to deep clean a whole carpeted house. This is a spot machine; use it alongside a rental, not instead of one.
Our score: 6.6 out of 10
Tank capacity3.0
Brush system4.0
Tools and reach8.5
Weight and handling9.5
Running cost8.0
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
07 · Most checkable claim
Shark CarpetXpert with Built-in Stain Cleaner (EX151)
The only extractor here whose deep-clean claim names its test standard — ASTM F2828 — which is exactly the kind of specificity we reward.
Built-in handheld spot and stain unit that extends from the machine
Formula
12 oz Deep Clean Essential formula included; ongoing purchase required
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+Names ASTM F2828 as its test method — the only carpet cleaner here that does
+Built-in handheld spot cleaner means one machine instead of an upright plus a Little Green
+Three tools and a dual-tank system
+PowerSpray is designed not to oversoak, which is the usual cause of slow drying
Where it stops
−30.4 fl oz is well under a gallon, so a big room means refills
−Shark's formula is the least widely stocked of the three brands here
−17 lb plus a tall body
Who it is for
One-machine households that want both the deep clean and the spot tool without buying two.
Skip it if
You already own a portable spot cleaner. The built-in stain unit is the headline feature and you would be paying for it twice.
Our score: 7.2 out of 10
Tank capacity5.5
Brush system9.0
Tools and reach9.5
Weight and handling5.5
Running cost6.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
08 · Longest warranty
Hoover SmartWash Pet Automatic Carpet Cleaner
Push to clean, pull to dry, no trigger to hold — and a five-year warranty, which is the longest published on this site by three years.
Motion-sensing: push forward to clean, pull back to dry. No trigger
Brushes
FlexForce Pet PowerBrushes, odor-resistant
Tools
Detachable Spot Chaser pre-treat wand, pet tool, 8-foot hose
Mixing
Auto Mix and auto-dry
Warranty
5 years
Every figure above is the manufacturer's own published number. Where a manufacturer publishes nothing, the row says "Not published" rather than an estimate.
What the numbers say
+A 5-year warranty is an unusual thing to publish on a machine full of pumps and seals, and it is worth real money
+No trigger to hold is a genuine relief over a whole room
+Spot Chaser pre-treat wand is detachable and useful on its own
Where it stops
−0.5-gallon tank on a 20.5 lb machine is the worst capacity-to-weight ratio here
−The tall 43.5-inch body needs proper storage height
−Automatic operation means less control over a stubborn patch
Who it is for
Buyers who value the warranty and hate holding a trigger.
Skip it if
You have a lot of open carpet. A half-gallon tank on a big floor means constant refills, and the Hoover PowerScrub Deluxe holds twice as much.
Our score: 6.9 out of 10
Tank capacity4.5
Brush system8.0
Tools and reach8.5
Weight and handling5.0
Running cost7.5
Scored against the published rubric on How We Pick. These are judgments about spec sheets, not measurements.
The one to skip
Skip the Hoover SmartWash Pet if accidents are your main problem. Its 5-year warranty is the longest published on this site and its automatic push-to-clean operation is genuinely pleasant. But at 20.5 lb with a 0.5-gallon tank it is the slowest machine here to deploy, and pet accidents are a speed problem before they are a capacity problem. It is a good machine bought for the wrong job.
The two-machine answer
For a pet household the sensible setup is usually a portable for accidents plus something bigger for the periodic deep clean — and the something bigger is very often a rental rather than a purchase.
A Bissell Little Green Pet Pro or a Hoover CleanSlate Plus handles every accident, every time, immediately. Twice a year you rent a large machine and do the whole floor. That combination costs less than a mid-range upright plus its formula, and it matches how pet messes actually arrive. The rental arithmetic is here.
The published comparison, ranked for pets
Manufacturer-published figures relevant to pet cleaning.
Machine
Weight
Tank
Pet tools
Self-rinse
Odor approach
Bissell Little Green Pet Pro 3909
Not published
XL clean and dirty tanks
Pet hair tool, crevice tool
Yes
Pet Pro Oxy formula
Bissell ProHeat 2X 3588F
Not published
3.79 L
2-in-1 pet upholstery tool, 3-in stain tool
Not published
Oxy pre-treater, antimicrobial brushes, FreshStart tank
Bissell TurboClean PET 3948
19.2 lb
1 gal
4-in self-cleanout tool, spraying crevice
Yes
Bissell pet formula
Hoover CleanSlate Plus
9.4 lb
1.18 L
7-in WidePath, TightSpot
Yes
Oxy solution
Hoover PowerScrub Deluxe
18.5 lb
3.8 L
Pet tool, upholstery tool
Not published
Hoover pet formula
Bissell Little Green Mini 4075
7 lb
16 oz
4-in tough stain tool
Yes, HydroRinse
Little Green formula
Shark CarpetXpert EX151
17 lb
30.4 fl oz
3 tools plus built-in handheld
Not published
Traps and removes odors, per Shark
Hoover SmartWash Pet
20.5 lb
0.5 gal
Spot Chaser wand, pet tool
Not published
Odor-resistant FlexForce brushes
What we cannot tell you
Whether any of these removes a specific odor from a specific carpet. Odor removal depends on how deep the liquid went, how long it sat, and what is underneath — none of which a machine specification addresses. If a mess reached the underlay, no surface extractor reaches it, and that is a limitation of the category rather than of any model. The pet urine guide covers what to do in that case honestly.
Common questions
What is the best carpet cleaner for pets?+−
The Bissell Little Green Pet Pro 3909 for most households — not because it is the biggest, but because pet accidents need treating within minutes and a portable that lives in a cupboard actually gets used. For whole-floor deep cleans, the Bissell ProHeat 2X 3588F publishes the strongest tool set.
Do carpet cleaners remove pet urine odor?+−
They remove what they can reach. If the liquid soaked into the underlay or subfloor, no surface extractor gets to it, and that is a limit of the category rather than of any model. Formula claims from Bissell and Shark address odor in what remains at the surface.
Should I buy an upright or a portable for pet messes?+−
A portable, in most cases. Accidents are a speed problem: treated within minutes they come up, left overnight they soak in. A 7 to 9 lb portable is running in ninety seconds; a 20 lb upright is not.
What is a self-cleaning hose tool and do I need one?+−
It flushes the hose and internal path with clean water after use — Bissell calls it HydroRinse, Hoover calls it a hose rinse tool. You need it, because a portable used on pet messes retains organic material otherwise, and a machine that smells is a machine nobody uses.
Do antimicrobial brushrolls help with pet smells?+−
They stop the machine itself smelling, which is worth having. They do not remove odor from your carpet — that requires extraction of the source. Hoover publishes antimicrobial brushrolls on the PowerDash and SmartWash; Bissell publishes them on the ProHeat 3588F.
Sources
Manufacturer-published specifications — Every runtime, wattage, capacity, weight, filtration and warranty figure quoted on this page is the manufacturer's own published number for that model, retrieved September 1, 2026. Where a manufacturer publishes no figure, the page says 'Not published' rather than estimating one.
Sweep & Suction — How We Pick — Our published method, including the scoring rubric, the three-year running-cost formula and an explicit statement of what published specifications cannot tell you.
