Dental Health Dog Food: Which Diets Are Proven to Reduce Plaque and Tartar

TL;DR

A dental health dog food is a complete diet designed to clean the teeth as your dog chews, through larger kibble, a fibrous texture or an anti-tartar coating. Only foods accepted by the Veterinary Oral Health Council (VOHC) have shown this in controlled trials. As of August 2026, that list includes Hill's Prescription Diet t/d, Hill's Science Diet Oral Care, Purina Pro Plan Veterinary Diets DH, Royal Canin Dental and several others. A dental diet works about as well as a daily dental chew, and less well than daily brushing.

How dental diets work

The AAHA dental guidelines describe two mechanisms:

• Mechanical. The kibble is larger or has a texture that cleans the tooth surface as the dog chews.
• Chemical. The kibble is coated with an anti-tartar agent, such as a polyphosphate that binds calcium in saliva.

Studies back both:

• Kibble size. In a 2007 study of 40 young Beagles, increasing kibble diameter by 50% was linked to a 42% reduction in tartar. Coating the kibble with sodium tripolyphosphate reduced tartar by a further 55%. The effect was strongest on the back chewing teeth.
• Coatings. In 1995 studies in Beagles, coating dry food or plain biscuits with sodium hexametaphosphate reduced tartar formation by about 60% to 80%, depending on the regimen.

The Merck Veterinary Manual also notes that dogs eating a regular diet of hard kibble develop fewer gum problems because of the mechanical cleaning effect, though ordinary kibble is not designed or tested for this.

VOHC-accepted dental diets for dogs

The August 2026 VOHC list for dogs includes these dental diets:

• Hill's Prescription Diet t/d Original Bites and Small Bites, plaque and tartar (veterinary only)
• Hill's Science Diet Oral Care, including Small & Mini formulas, plaque and tartar
• Hill's HealthyAdvantage Oral Care, plaque and tartar
• Hill's Science Plan Vet Essentials Multi-Benefit + Dental Adult Small & Mini and Medium & Large, plaque and tartar
• Purina Pro Plan Veterinary Diets DH and DH Small Bites, tartar (veterinary only)
• Purina Pro Plan Veterinary Diets essentialcare Adult (Canada), tartar (veterinary only)
• Royal Canin Veterinary Care Nutrition Canine Dental and Dental Small Dog, tartar (veterinary only)
• Eukanuba Adult Maintenance Diet for Dogs, tartar
• Canagan Dental for Dogs, plaque and tartar
• Performatrin Prime Adult Oral Care Chicken & Rice, tartar

Some are sold only through vets. Check the current VOHC list for the exact product, because availability varies by country.

How well do dental diets work compared with other options?

A 2019 randomized, blinded trial in a general practice compared three plaque control methods over 6 weeks after a professional cleaning: daily brushing, one daily dental chew, and a prescription dental diet. Brushing was more than three times as effective. The diet and the chew were about equal, and results varied more from dog to dog.

That makes a dental diet a sensible choice for a dog that will not tolerate brushing, or an extra layer for a dog that is brushed. The AAHA guidelines call these diets "especially helpful if the owner is unable or unwilling to brush."

How to use a dental diet properly

• Feed it as the main diet. AAHA notes that many clinicians encourage complete and balanced dental diets as the lifelong source of nutrition. Most of the effect comes from chewing the kibble, so a handful as a topper is not the same as feeding the diet.
• Check it suits your dog. It must be complete and balanced for your dog's life stage, and right for any other health conditions. Prescription dental diets need your vet's approval.
• Start after a cleaning. Diets slow new plaque and tartar. VCA notes that once tartar has formed, it needs professional scaling under anesthesia.
• Reassess. AAHA advises vets to check compliance and effect at later exams. Ask at your dog's next visit whether it is working.

When a dental diet is not the right choice

• Your dog has painful teeth. A dog that avoids chewing will not get the mechanical benefit and may eat less. Get the mouth treated first. See soft food for senior dogs with bad teeth.
• Your dog needs a different therapeutic diet for kidney, digestive or other conditions. Your vet will decide which need comes first.
• Your dog swallows kibble whole. The cleaning effect comes from chewing, and in the 2007 study it was strongest on the back chewing teeth.

FAQ

Does dry food clean dogs' teeth?

Ordinary kibble may help a little, but it is not designed or tested for it. Dental diets are, and the VOHC-accepted ones have trial data.

Is a dental diet better than dental chews?

In the 2019 trial they performed about the same. Choose based on what suits your dog. Some owners use both.

Can I add a dental powder or water additive to a dental diet?

Generally yes, as long as the products suit your dog. A 2025 study found that a water additive improved gum health when combined with a daily dental chew. See how to clean dog teeth without brushing.

References

• American Animal Hospital Association. 2019 AAHA Dental Care Guidelines: nutrition.
• Veterinary Oral Health Council. VOHC Accepted Products for Dogs. List updated August 2026.
• Hennet P, Servet E, Soulard Y, Biourge V. Effect of pellet food size and polyphosphates in preventing calculus accumulation in dogs. Journal of Veterinary Dentistry. 2007. PMID: 18309857
• Stookey GK, Warrick JM, Miller LL. Effect of sodium hexametaphosphate on dental calculus formation in dogs. American Journal of Veterinary Research. 1995. PMID: 7574160
• Allan RM, Adams VJ, Johnston NW. Prospective randomised blinded clinical trial assessing effectiveness of three dental plaque control methods in dogs. Journal of Small Animal Practice. 2019. PMID: 30575038
• Gawor J, Jank M, Harvey CE, Nicolas CS. Effectiveness of dental homecare protocols in unscaled dogs. Journal of Veterinary Dentistry. 2025. PMID: 39587858
• Merck Veterinary Manual. Dental disorders of dogs.
• VCA Animal Hospitals. Dental Disease in Dogs.