Expert Summary
- Periodontal disease affects over 80% of dogs over age 3 — it is the most common clinical condition in veterinary medicine and the primary reason dental care matters.
- The Veterinary Oral Health Council (VOHC) seal is the gold standard for dental product claims — it requires controlled studies showing at least 10% plaque or tartar reduction.
- Dental chews reduce plaque buildup but do not treat existing gum disease or replace annual professional cleanings for dogs over 3 years old.
Dental disease is the most common health condition in dogs — more prevalent than obesity, arthritis, or allergies. By age 3, more than 80% of dogs have some degree of periodontal disease. The consequences go beyond bad breath: untreated gum disease causes pain, tooth loss, and bacterial spread to the kidneys, heart, and liver. Dental chews are a practical, dog-approved tool for slowing disease progression — here is what actually works.
The VOHC Seal: Why It Matters
The Veterinary Oral Health Council (VOHC) is an independent body that evaluates dental product claims. Products earning the VOHC seal have submitted controlled clinical studies demonstrating at least 10% reduction in plaque accumulation or tartar formation.
Without the VOHC seal, a product's dental health claims are unverified marketing. Dozens of products advertise dental benefits without evidence.
Products with VOHC acceptance as of June 2026:
Dental Chews
| Product | Sizes Available | Calories Per Chew | Key Claim |
|---|---|---|---|
| Greenies Original | Teenie to Large | 75–150 | Plaque and tartar |
| Virbac C.E.T. Enzymatic Chews | XS to XL | 85–165 | Enzymatic + mechanical |
| OraVet Dental Hygiene Chews | XS to LG | 75–130 | Plaque and malodor |
| Purina DentaStix (Daily) | Small/Medium/Large | 70–125 | Tartar reduction |
| Arm & Hammer Dental Chews | Multiple | 55–110 | Baking soda formula |
How Dental Chews Work
Mechanical action: The chew's texture creates abrasion against tooth surfaces during chewing, physically removing plaque biofilm before it mineralizes into calcified tartar.
Enzymatic action: Some chews (Virbac C.E.T., Enzymatic) contain glucose oxidase and lactoperoxidase — enzymes that generate hydrogen peroxide in the presence of saliva, inhibiting bacterial growth.
Active ingredients: Some products contain sodium hexametaphosphate, a polyphosphate that binds to calcium ions and reduces tartar formation.
No dental chew removes tartar (calcified plaque) that has already formed. Once tartar is present, only professional scaling with anesthesia removes it.
Insight
The VOHC currently lists 22 dog products with the plaque or tartar seal, including chews, diets, water additives, and toothpastes. The full list is available at vohc.org. Using only VOHC-accepted products ensures you are buying evidence-based dental care.
Source: Veterinary Oral Health Council (VOHC), 2026
How to Choose the Right Size
Using the wrong chew size is the most common mistake. An undersized chew is a choking hazard and provides minimal cleaning benefit; an oversized chew may not be manageable for small dogs.
General size matching:
| Dog Weight | Chew Size |
|---|---|
| Under 5 lbs | Petite/Teenie (e.g., Greenies Teenie) |
| 5–15 lbs | Small |
| 15–30 lbs | Medium |
| 30–60 lbs | Large |
| Over 60 lbs | XL/Jumbo |
Always supervise your dog during the first few uses of a new chew product, especially with enthusiastic chewers who may try to swallow large pieces.
Dental Chews vs. Brushing vs. Professional Cleaning
Understanding how these interventions compare helps set realistic expectations:
| Intervention | Plaque Reduction | Tartar Removal | Frequency | Cost |
|---|---|---|---|---|
| Daily brushing | 60–70% | No | Daily | $5–15 for toothbrush/paste |
| VOHC dental chews | 20–30% | No | Daily | $20–60/month |
| Water additives | 10–20% | No | Daily (in water bowl) | $10–20/month |
| Professional dental cleaning | 100% of accessible surfaces | Yes | Annually or as needed | $300–1,000+ |
The honest hierarchy:
- Daily brushing is the most effective home dental care
- Daily VOHC dental chews provide meaningful benefit for dogs who will not tolerate brushing
- Water additives are the lowest-effort option with the least benefit
- Professional cleaning is irreplaceable for dogs with established tartar and gum disease
Most veterinarians recommend a combination: annual professional cleaning + daily home care (brushing or chews).
Starting Dental Care at the Right Age
Puppies (8–16 weeks): Begin handling the mouth daily. Rub your finger along the gums and teeth to normalize the sensation. Introduce puppy toothpaste (never use human toothpaste — xylitol is toxic to dogs) and a finger brush.
Adolescents (4–12 months): Avoid hard chews during teething. Start dental chews formulated for puppies after adult teeth are fully in (around 6 months). Establish a brushing routine while the dog is young and tolerant.
Adults (1–7 years): Full dental care program — brushing 3–7 times per week, daily chew, annual vet dental check.
Seniors (7+ years): Dental disease is nearly universal. Many senior dogs need professional cleaning under anesthesia. Anesthesia for dental procedures is safe in healthy senior dogs with pre-anesthetic bloodwork — the risk of untreated dental disease is higher than the anesthesia risk for most patients.
Ingredients to Avoid in Dog Dental Products
- Xylitol: Extremely toxic to dogs — found in some human dental products. Always read labels.
- Artificial sweeteners (sorbitol, aspartame): Not well studied in dogs; unnecessary
- Propylene glycol: FDA approved but controversial; avoid in cats
- Generic "meat by-products" as primary ingredient: Lower-quality dental chews use filler proteins; choose products with named protein sources
Dog Nutrition Guide: AAFCO standards, life-stage feeding, and what to avoid →
Do dog dental chews actually work?
Yes, with important qualifications. VOHC-accepted dental chews have demonstrated at least 10% plaque or tartar reduction in controlled studies — a meaningful benefit for preventing disease progression. However, they work mechanically and do not treat existing gum disease, remove calcified tartar, or replace brushing and professional cleanings.
How often should I give my dog a dental chew?
Daily use provides the best results for plaque prevention. Most dental chews are designed for daily administration. Check the packaging for weight-appropriate serving size and ensure dental chews are counted toward your dog's daily calorie allowance — many provide 70–150 calories per chew.
Are Greenies safe for dogs?
Greenies are VOHC-accepted and safe for most dogs when given the appropriate size. Early reports of digestive blockages in the 2000s led to a formula reformulation — the current formula is designed to be digestible. Supervision is recommended, especially for dogs that eat quickly.
Senior dog care guide: dental disease and aging dog health →