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In this guide
The FURminator Undercoat deShedding Tool for medium-sized dogs with long hair is a stainless steel edge on an ergonomic handle: a Skin Guard rides the dog while the edge reaches through the topcoat for loose undercoat, and a FURejector button pushes collected hair off the teeth. The maker, a Spectrum Brands brand, still lists this tool in its UK range as FURminator Dog M Long Hair and claims up to 90 percent less loose hair from shedding with regular use. Pets at Home lists the Medium at £24.00 on 2026-10-16 with Add to basket, home delivery and free Click & Collect.
Everything about the tool is a matching exercise: edge to weight band and coat length, session to the once-or-twice-weekly cadence, coat condition to the dry-and-mat-free requirement. A guarded edge used on the wrong dog or the wrong coat still meets skin it should not.
Our verdict
Buy the Medium Long Hair tool at £24.00 for a 9-to-23-kilogram shedding dog with long hair and keep the weekly cadence; a matted coat needs a dematter first, and dogs outside the band need another size.
- A good fit for
- Owners of long-haired shedding dogs between 9 and 23 kilograms who will run 10-to-20-minute sessions once or twice a week, on a dry, brushed-out coat.
- We would skip it if
- Skip it for non-shedding or single-coat breeds, particularly sensitive skin, or a matted coat, where the teeth can bend; dogs under 9 or over 23 kilograms need the small or large edge.
Reasons to consider it
- The stainless steel edge sits behind a Skin Guard that the maker says glides over skin and stops the edge digging in at the ends of a stroke, and a curved edge follows the dog's shape
- A FURejector button pushes collected hair off the teeth mid-session, and an Edge Guard protects the teeth in storage, so the tool needs no cap
- Pets at Home sells the Medium at £24.00 with Click & Collect always free, and its three long-hair sizes step gently, £23.00, £24.00 and £28.00, so matching the tool to the dog takes two facts: weight and coat length
The compromises
- The no-cut claim is conditional, "when the tool is used as directed", and the maker's directions concede that deep or rough brushing can still irritate skin, so pressure discipline stays with the hand holding the tool
- Undercoat is the whole scope: the maker excludes non-shedding breeds and particularly sensitive skin, and a matted or tangled coat needs a dematter or rake first or the teeth can bend or break
- The maker's UK site sells nothing and points to a store locator, so the £24.00 is a retailer's price, and the maker's anti-counterfeit page tells buyers to know exactly who is selling before they pay
What we have not verified: The maker's UK page gives no weight band, no edge width and no price, so the sizing rests on Pets at Home's copy. That page prints 12.7 cm wide for both the Small and the Medium, which cannot be an edge width. The up-to-90-percent figure is the brand's own regular-use wording, with no independent test behind it, and the UK pages read list no money-back or warranty terms for the tool.
The things in this guide
A closer look at the products, who they may suit, and what to check before buying.
Undercoat deShedding Tool (Medium Dog, Long Hair)
£24.00 at Pets at Home buys a guarded stainless edge sized to dogs of 9 to 23 kilograms with long hair, a FURejector button that clears hair mid-session, and an Edge Guard for cap-free storage.
Before you buy: The no-cut claim holds only when used as directed: dry coat, mats removed first, gentle strokes, no sensitive skin. Dogs outside the weight band need the small or large edge.
Price checked 16 October 2026. Retailer prices can change.The edge and the asterisk
The headline claim runs: a stainless steel deShedding edge that reaches through the topcoat to remove loose hair and undercoat without damaging the topcoat or cutting the skin, when the tool is used as directed. The maker's directions define directed use. Work like a brush, in the direction of hair growth, teeth angled toward the coat, starting at the head and working back, with extra care near the stomach, legs, genitals and anus. Fewer long, gentle strokes up and away from the skin; no excessive stroking in one spot.
The condition in that sentence is real. The directions concede that deep or rough brushing can still irritate pet skin even with the Skin Guard, so pressure stays limited and any redness or irritation ends the session. The curved guard is the engineering under the promise, since it stops the edge digging in at the ends of a stroke, but a guard plus a heavy hand still lands on the dog. The maker also draws the boundary around the claim: most shedding dogs qualify, while breeds without an undercoat shed so little that brushing or combing is enough, and sensitive skin is a reason to leave the tool alone.
One design, a ladder of sizes
The maker's UK dog range climbs from extra small to extra large in Long Hair, with Short Hair versions alongside. Its own pages name no weight band, so the bands come from Pets at Home: Small 4.5 to 9 kg, Medium 9 to 23 kg and Large 23 to 41 kg, for long fur over 5 cm. On that page the prices step gently, £23.00, £24.00 and £28.00, so choosing the wrong size costs little next to the cost of using it on the wrong dog.
Edge width is the number nobody publishes. Pets at Home prints 12.7 cm wide for the Small and the Medium alike, which describes the product rather than the edge, and the maker's UK pages give no width at all. The working rule is the maker's own: match the weight band, then match the coat length. A 15-kilogram short-coated dog belongs on the Short Hair edge; a 30-kilogram long-coated one on the Large.
Ten to twenty minutes, once or twice a week
The maker's schedule reads one to two sessions a week, 10 to 20 minutes each, varying with breed, coat condition and thickness, with more frequent sessions in heavy shedding seasons; Pets at Home repeats it. Timing carries a condition: any time on a completely dry coat, ideally right after washing or drying. Preparation comes first: a full inspection for sores, bruises and skin conditions, with a vet before brushing if any turn up, and tangles or mats removed with the FURminator Adjustable deMatter Tool or a grooming rake before the edge touches fur.
Mats are the teeth's stated enemy: work the tool over matted or tangled fur and the teeth can bend or break, besides hurting the dog. Aftercare is short — warm water and mild soap when dander collects on the edge, a complete dry before storage, and the built-in Edge Guard locked over the teeth by pressing the FURejector button and pulling back, which stores the tool without a cap. The FURejector does double duty mid-session, pushing accumulated hair off the teeth so the session keeps moving.
Where to buy it, and the fakes
The maker's UK site sells nothing: its page for this tool carries no price and a store locator takes the place of a buy button. Its anti-counterfeit page says fakes are poorly made imitations known to break easily and able to injure a pet, and that the remedy is to buy from a recognised FURminator retailer. Its tests are practical. Be wary of retailers that mostly sell non-pet goods and of one-off marketplace sellers, and remember that the seller is not always the party that ships the parcel.
At Pets at Home, a national pet specialist selling on its own site, the Medium shows £24.00 with Add to basket, free Click & Collect and home delivery that is free over £40. A price well below that, from a seller that is not a pet specialist, is exactly the deal the maker warns about.
Who should skip it
The maker's exclusions write most of the skip list: non-shedding breeds and pets with particularly sensitive skin should not use the tool at all; a dog with sores or a skin condition needs a vet before any brushing; a matted coat goes to a dematter or rake first, and heavy matting is a groomer's job rather than a weekly edge's. Sizing cuts another slice, since dogs under 9 or over 23 kilograms belong on the small or large version, not this one.
Scope does the rest. This edge pulls loose undercoat on the dog, and the up-to-90-percent reduction figure is the brand's regular-use claim, with the weekly session above as what regular means. Hair already on the sofa is the sofa's problem; a reusable roller covers that side without involving the animal. An owner unwilling to spend twenty minutes a week on the coat is outside the condition the claim is written on.
How we put this together
Built from the product pages and listings below, without test scores or results we have not measured. Specifications and prices change, so check the original page for the exact model, current price, delivery, and returns.
- FURminator UK: Dog M Long Hair (Undercoat deShedding Tool, medium breed, long hair) (opens in a new tab)
- FURminator UK: Does the FURminator ruin the fur? Myths and facts (opens in a new tab)
- FURminator UK: Avoid the fakes (opens in a new tab)
- Pets at Home: FURminator De-shedder Grooming Tool For Long Haired Medium Dogs (opens in a new tab)
- FURminator UK: FAQs (opens in a new tab)
