How this LOPSIC dog nail grinder review was made: I haven’t used this grinder, and I don’t have a dog. I read the forty most recent high-star reviews and the thirty-nine most recent low-star reviews on LOPSIC’s listing, posted between late August and early October 2026, and summarised them the same way as every review on this site. That’s a sample, not a census, and most ratings have no written review. Star percentages are Amazon’s published figures. Nothing here is sponsored. The Amazon links on this page are affiliate links: as an Amazon Associate I earn from qualifying purchases, at no extra cost to you.
LOPSIC’s S5 Pro is a cordless, rechargeable nail grinder: a small rotary tool with a spinning grinding bit, three speeds, four LED lights around the tip, and a cap with three openings for small, medium and large nails. The kit also includes a pair of clippers. When I checked the listing on 15 October 2026, it had 10,906 ratings and a 4.4 average: 73% five stars and 13% four stars, against 7% one or two stars combined.
It’s the number one seller in Amazon’s Cat Claw Care category, and many of its happiest owners have dogs that fought every other way of trimming. This LOPSIC dog nail grinder review covers why those dogs settle, how it copes with big nails, how owners got nervous dogs used to it, and the early failures worth testing for.
What owners love about it
Nervous dogs finally sit still. This is the strongest theme in the high-star reviews I read. One owner’s dog had fought nail trims for four years; they had tried other grinders that were too loud, and this was the first one the dog accepted, the day after it arrived. Another owner’s reactive dog started falling asleep during the trim, which saved them trips to the vet and groomer. A nervous Boxer tolerated it, and a pug that hates being handled was used to it after three tries.
The motor is quiet. Owners call it quiet again and again. A groomer says it’s the quietest of the grinders in their salon, and the dogs notice the sound far less than with the big grinders. One owner says it’s so much quieter than their older Dremel that the Dremel was retired straight away. Several add that the noise comes mostly when the bit touches the nail; more on that below.
The light helps you avoid the quick. The same groomer says the light makes the quick much easier to see. One owner, whose review has eight helpful votes, finished all their dog’s nails in a few minutes and got them much shorter without reaching the quick.
It’s a full kit. Owners like the included clippers, the dust cap that catches the filings, and USB charging. Some owners use it on cats too; one says the cats don’t fight it, though the dog does.
Getting a nervous dog used to it
The owners who succeeded with anxious dogs mostly went slowly, and that’s the most useful advice in this LOPSIC dog nail grinder review. One owner, following a tip from another review, kept the grinder near the dog and touched it to him before trying a nail, then gave grilled chicken after each one; two days later the dog was calm, and by day five he was waiting for his chicken. Another owner plays with the lights and runs the grinder over the dog like a massage. The pug owner needed three sessions.
It doesn’t always work. One low-star owner spent a few days getting their dog used to the sound, which didn’t bother her, but she refused the first touch on a nail and went to the groomer instead. If your dog has never accepted any grinder, the quiet motor may help, but it isn’t a guarantee.
Big dogs and thick nails
Owners split here more than anywhere else in this LOPSIC dog nail grinder review. On one side: an 80-pound pit bull whose owner pressed hard and says the motor didn’t slow; three large bully mixes done on high speed with no clipping first; huge shepherd paws; and three dogs of an Argentine breed with very tough nails, all on the first charge, though that owner says it can get hot. One owner who had tried five other grinders, including a cordless Dremel, calls it the best for both large and small dogs.
On the other: owners of a ridgeback and of other large dogs say it barely grinds their nails down, and one long-time Dremel user says it’s for small dogs only. One Shih Tzu owner also found it weak and slow. About one in five of the low-star reviews I read say it lacks power or takes too long.
The listing matches each speed to a dog size and says the coarse bit that comes fitted is the one for large dogs and thick nails. One low-star owner warns it could take days if you don’t clip first, and the groomer notes it takes a little longer on the biggest nails. So for a large dog: high speed, the coarse bit, and the included clippers for any long nails first.
Worth knowing before you buy
Test it early. This is the biggest theme in the low-star reviews I read, more than a third of them: a grinder that stopped working or stopped holding a charge. Owners describe anything from under 40 days to about six months, often with light use, such as twice a month for five months. One says the motor died and only the lights still came on. The listing mentions a two-year warranty, so keep your order details.
Quiet motor, not a silent grind. About a quarter of the low-star reviews say it isn’t as quiet as advertised. Several explain why: the motor is quiet when it’s running, but grinding the nail is louder and sends a vibration up the foot. One owner whose dog lies still for clippers saw him run off at the first touch.
Some pets won’t accept any grinder. A few owners say their dogs were scared or wouldn’t allow it, a seven-year-old dog that had never nipped did, and one owner’s three cats were terrified the moment it turned on. The light also has limits: one owner says it did nothing for their puppy’s black nails, and another found the lights no help.
Check the box. Two owners received kits missing parts, one with only the grinder and charger. One says a cover didn’t fit; the listing says to remove the black cover before fitting the clear dust cap, then twist it clockwise to lock.
LOPSIC dog nail grinder review: who it suits
Buy it if your dog or cat panics at clippers or at louder grinders, and you’re willing to introduce it slowly. Small and medium dogs fit it best, and owners of many big dogs are happy too, on high speed with the coarse bit.
Look elsewhere if you need to take a lot off thick, overgrown nails quickly, or if you want something you won’t need to test in its first months. If shedding is your other grooming battle, see the best dog grooming vacuum guide.
For most homes, this LOPSIC dog nail grinder review comes down to two things: go slowly with a nervous dog, and use it often enough in the first month to know it works. Current listing and price. For more, see the pet reviews.
The reviews behind this
The reviews behind this LOPSIC dog nail grinder review, by rating, month and colour, so you can find them on the listing. Votes are noted only where there are several. No names and no quoted text; these are my summaries.
| Rating | Posted | What it reports |
|---|---|---|
| 5 star | Sep 2026 | Black: the dog fought trims for four years; first grinder quiet enough to work |
| 5 star | Sep 2026 | Purple: a reactive dog fell asleep; no more vet or groomer trips |
| 5 star | Sep 2026 | Black: all nails in minutes; much shorter without reaching the quick (8 votes) |
| 5 star | Oct 2026 | Purple: tried five grinders including a cordless Dremel; best for large and small dogs (2 votes) |
| 5 star | Sep 2026 | Orange: a groomer; quietest in the salon; the light shows the quick |
| 5 star | Sep 2026 | Black: 80-pound pit bull; the motor kept going under pressure |
| 5 star | Sep 2026 | Black: three large bully mixes; done on high with no clipping first |
| 5 star | Sep 2026 | Black: three dogs with tough nails on the first charge; can get hot (2 votes) |
| 5 star | Sep 2026 | Black: a nervous Boxer tolerated it; the noise is mainly when grinding |
| 5 star | Sep 2026 | Black: slow introduction with chicken; calm within days; owner’s video |
| 4 star | Sep 2026 | Black: a pug that hates handling; used to it after three tries |
| 5 star | Sep 2026 | Black: the light and guard help; retired an older Dremel |
| 5 star | Sep 2026 | Orange: the cats don’t fight it; the dog does |
| 3 star | Sep 2026 | Black: quiet and the dogs were calm; then it stopped working |
| 2 star | Sep 2026 | Black: the motor failed after six months; only the lights work |
| 1 star | Sep 2026 | Black: the owner’s third; stopped in under 40 days |
| 1 star | Sep 2026 | Black: bought in February, stopped by August |
| 1 star | Sep 2026 | Black: five months of twice-monthly use, then it won’t turn on (2 votes) |
| 1 star | Sep 2026 | Black: won’t hold a charge between weekly uses |
| 3 star | Sep 2026 | White: the motor is quiet, but grinding is loud and vibrates up the foot (2 votes) |
| 2 star | Sep 2026 | Black: quiet until it grinds; the dog hated it; easy return |
| 3 star | Sep 2026 | Black: grinds to a stop on a ridgeback’s nails |
| 2 star | Sep 2026 | Black: barely grinds a large dog’s nails |
| 3 star | Aug 2026 | Orange: weak and slow even on a Shih Tzu |
| 1 star | Aug 2026 | Black: the box held only the grinder and charger (7 votes) |
| 2 star | Sep 2026 | White: three cats terrified as soon as it turned on |
| 3 star | Sep 2026 | Grey: the light didn’t help with a puppy’s black nails; the file felt harsh (2 votes) |
| 2 star | Aug 2026 | Black: days of getting the dog used to the sound; she still refused the first touch |
Common questions
Is it really quiet?
The motor is, by most accounts, including a groomer’s. Grinding the nail itself is louder and causes some vibration, and about a quarter of the low-star reviews I read say it isn’t as quiet as advertised.
Does it work on large dogs?
Owners split. Several with big dogs, up to an 80-pound pit bull, are happy on high speed; others with large breeds found it too weak. Clipping long nails first helps.
How long does the battery last?
The listing says a 2,000 mAh battery gives about 12 hours of use from a 3-hour charge. A groomer says it has never run out mid-shift; one low-star owner says it doesn’t hold a charge from one week to the next.
Can I use it on cats?
The listing says yes, on the low speed and small opening. Some owners say their cats accept it; one owner’s three cats were scared of the sound.
Is there a difference between the colours?
They share one listing and one set of reviews. The reviews I read were mostly for Black.
Star percentages are Amazon’s published figures at the time of writing and will drift as new ratings arrive. Patterns above are summarised in my own words from a sample of the written reviews available on this listing, which is smaller than the listing’s full review count and much smaller than its total ratings. Product images are from the manufacturer’s listing. Specifications, pricing and availability change; check the listing for current details.