Periodontal disease affects the majority of dogs by three years old, and the dental chew market exists because brushing a dog’s teeth is a chore most owners would rather avoid.
The honest answer is that some chews have real evidence, none replaces brushing, and the packaging is not a reliable guide to which is which.
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The seal that means something
The Veterinary Oral Health Council (VOHC) awards a seal to products that have submitted data from trials meeting its standards, showing a meaningful reduction in plaque or tartar.
It is a voluntary scheme rather than a regulator, and a product without the seal is not necessarily useless — but a product *with* it has submitted evidence, and that is more than most.
The VOHC publishes its accepted products list publicly, separated into plaque-control and tartar-control claims. It is worth checking a product against the list rather than trusting the front of the packet.
Phrases like “helps clean teeth”, “supports dental health” and “reduces tartar” are unregulated marketing.
How a chew works
Two mechanisms:
Mechanical. The texture of the chew scrapes the tooth surface as the dog bites through it. The design matters — products engineered so the tooth sinks into the chew rather than shattering it give more surface contact.
Chemical. Some contain ingredients that bind calcium in saliva, slowing the mineralisation of plaque into tartar.
Both act mainly on the crown — the visible part of the tooth. Neither reaches meaningfully below the gumline, which is where periodontal disease actually happens.
That is the key limitation. A dog with gleaming crowns can still have significant disease at the roots.
Greenies Teenie Dental Dog Treats
One of the better-studied dental chews, with a texture designed for the tooth to sink in rather than shatter it. Size matters — feed the size band matched to your dog’s weight, because a chew too small is swallowed whole and does nothing.
The calorie problem
A dental chew is food, and a substantial amount of it.
A mid-size dental chew carries roughly 70 to 100 kcal. For a 10kg dog eating 500 kcal a day, that is a fifth of their daily intake — from one chew, given daily, on top of meals.
Obesity does more damage to a dog over a lifetime than tartar does. If you give a daily dental chew, subtract it from the meal.
What does work better
Brushing. The only method proven to prevent plaque accumulation, because it is the only one that reaches the gumline. Daily is ideal; three times a week is the realistic minimum that makes a measurable difference.
The three-day window matters: plaque mineralises into tartar within about 72 hours, and once it does, brushing cannot remove it.
C.E.T. Oral Hygiene Kit for Dogs
An enzymatic poultry-flavoured toothpaste with a brush. Introduce it over two weeks — paste on a finger first, then rubbed on the front teeth, then the brush — and most dogs come to treat it as a daily treat rather than a procedure.
Never use human toothpaste: fluoride is not meant to be swallowed, and many contain xylitol, which is severely toxic to dogs.
Dental diets. Specific therapeutic foods with larger, fibre-aligned kibble designed to wipe the tooth surface. These have evidence. Ordinary kibble does not clean teeth — that claim is marketing.
Professional scaling under anaesthetic, which is the only way to remove existing tartar and treat disease below the gumline. Home care slows disease; it does not reverse what is already there.
What to avoid
The thumbnail test. If you cannot make a dent with your thumbnail, it is hard enough to fracture a tooth.
That rules out:
- Antlers — a frequent cause of slab fractures of the carnassial teeth
- Hooves
- Weight-bearing bones from large animals, cooked or raw
- Very hard nylon chews
- Ice cubes, for dogs who crunch them hard
- Tennis balls as a permanent carry toy, which are abrasive and wear teeth flat
Rawhide. Softens and can be swallowed in large pieces, with choking and obstruction risk. Processing quality varies widely.
Cooked bones of any kind. They splinter.
Anaesthesia-free dental cleaning. Scrapes visible tartar off the crown, which looks better while doing nothing about disease below the gumline, and requires restraining a conscious dog throughout.
A realistic routine
- Brush most days. Two minutes. Outside surfaces only, at 45 degrees to the gumline, lifting the lip rather than opening the mouth
- A VOHC-accepted dental chew daily, with the calories subtracted, as a supplement
- Appropriate chew toys that pass the thumbnail test
- A veterinary dental check at least annually, and full-mouth radiographs when a dental is performed
- Professional cleaning when your vet advises
The sign not to ignore
Bad breath. “Dog breath” is treated as normal and it is not — it is usually the first indication of periodontal disease, and periodontal disease is painful in a way dogs conceal almost perfectly.
Owners routinely describe a dog becoming visibly happier after dental treatment. That is not the treatment being remarkable; it is the pain having been there, quietly, for years.
A chew is a useful addition to a dental routine. It is not a dental routine.
