Pet Dental Chews: How They Work, Benefits & Best Options 2026

Pet dental chews are treats designed to mechanically scrub plaque from teeth and freshen breath through chewing action. The best dental chews carry the Veterinary Oral Health Council (VOHC) seal — meaning they’re clinically proven to reduce plaque or tartar by at least 10%. They’re a useful supplement to brushing, not a replacement.

This guide is for informational purposes. Dental chews should complement, not replace, regular professional dental cleanings. Consult your vet for a complete dental care plan.

How Dental Chews Work

Pet dental chews work through two primary mechanisms:

1. Mechanical Abrasion

When a dog or cat chews, the action of gnawing against the chew’s texture physically scrubs plaque from tooth surfaces. The effectiveness depends on how deeply the pet chews and how long they engage with the chew. Treats that are swallowed in seconds provide little dental benefit.

2. Active Ingredients

Many dental chews contain ingredients that inhibit plaque formation or reduce bacteria:

• Hexametaphosphate (HMP) — Coats the tooth surface and prevents calcium from binding with plaque to form tartar
• Chlorhexidine — Antimicrobial agent that reduces oral bacteria
• Zinc — Inhibits bacterial growth and reduces bad breath
• Enzymes — Some chews contain enzymatic compounds that break down plaque at a biochemical level

Do Dental Chews Actually Work?

The honest answer: it depends on the product. The pet industry is full of dental treats with minimal evidence behind them. For a dental chew to be worth buying, it should have real clinical evidence.

What the research shows:

• VOHC-accepted dental chews reduce plaque by 10–70% depending on the product and study
• Daily use is required — occasional chews don’t provide meaningful dental benefit
• Chews work best on plaque (soft buildup) before it mineralizes into tartar; they do very little for existing tartar
• Dental chews are significantly less effective than daily tooth brushing, but more effective than no dental care at all

Source: VOHC clinical data and American Veterinary Dental College guidance, 2024

The VOHC Seal: What It Means

The Veterinary Oral Health Council (VOHC) is an independent body that evaluates veterinary dental products. A VOHC Accepted seal means the product has completed controlled clinical trials showing it reduces plaque or tartar accumulation by at least 10% compared to control groups.

VOHC-accepted products for dogs include: Greenies (original dental chews), Purina DentaLife, Hill’s Science Diet Dental Chews, and specific prescription dental diets.

For cats: Greenies Feline Dental Treats carry VOHC acceptance — cat dental chew options are more limited than for dogs.

If a dental treat doesn’t carry the VOHC seal, there’s no independent evidence it works.

Types of Pet Dental Chews

Rawhide (Traditional)

Provides prolonged chewing time which mechanically cleans teeth. However, raw rawhide carries risks of bacterial contamination, choking, and intestinal obstruction. Many vets no longer recommend traditional rawhide. Safer alternatives have largely replaced it.

Processed Dental Chews (Greenies, DentaLife, etc.)

Highly digestible, designed with texture optimized for dental scrubbing. Greenies are the most studied and have VOHC acceptance. Available in sizes calibrated to dog weight. Daily use is recommended. These are the most vet-recommended category.

Natural Chews (Bully Sticks, Antlers, Raw Bones)

Provide chewing time but vary widely in dental efficacy. Very hard chews (antlers, marrow bones) carry fracture risk for back teeth — the “ball-point pen test” applies: if you can’t dent it with your thumbnail, it’s too hard for a dog’s teeth.

Dental Treats for Cats

Cats are more challenging — they’re often disinterested in chews. Greenies Feline Dental Treats are the main VOHC-accepted option. Dental diets (prescription or over-the-counter) can be an effective alternative for cats.

Safety Considerations

• Size matching is critical — Always choose a chew sized for your dog’s weight. Too-small chews are choking hazards; too-large chews may not get properly engaged.
• Supervise chewing — Until you know how your pet interacts with a chew, always supervise to prevent gulping or choking
• Caloric content counts — Dental chews add calories; factor them into daily food allowances to avoid weight gain
• Avoid for dogs with dental disease — Dogs with broken teeth, oral tumors, or post-dental surgery should not have hard chews without vet clearance
• Watch for digestive upset — Some dogs react to new chew ingredients; introduce new products gradually
• Not a replacement for professional cleaning — Even with daily dental chews, professional dental cleanings under anesthesia are recommended. Find dental-savvy veterinary clinics on HeiBob.

Frequently Asked Questions About Pet Dental Chews