Here’s a statistic that surprises most pet owners: according to the American Veterinary Dental Society, over 80% of dogs and 70% of cats show signs of dental disease by the time they’re just three years old. Three years old. In animals that may live 15 years or more.
Dental disease isn’t just bad breath and yellow teeth — it’s a painful condition that affects eating, quality of life, and overall health. The bacteria from infected gums and teeth can enter the bloodstream and damage the heart, kidneys, and liver over time. And because pets instinctively hide pain, many animals suffer from significant dental disease for months or years before their owners realize anything is wrong.
The good news is that dental disease is largely preventable — with the right habits, the right tools, and regular veterinary care.
Understanding Pet Dental Disease
Dental disease in pets follows the same progression as in humans, just faster.
It starts with plaque — a soft, sticky film of bacteria that forms on teeth within hours of eating. If plaque isn’t removed, it mineralizes within days into tartar (also called calculus) — a hard, yellowish deposit that adheres firmly to the tooth surface and cannot be removed by brushing alone.
Tartar buildup causes gingivitis — inflammation of the gums, which appear red, swollen, and bleed easily. At this stage, the disease is still reversible with professional cleaning.
If gingivitis progresses to periodontitis, the infection spreads below the gumline, destroying the periodontal ligament and bone that support the teeth. This stage causes significant pain, tooth loosening, and tooth loss — and is not reversible. The bacteria involved in periodontitis can also enter the bloodstream, contributing to systemic inflammation and organ damage.
Signs of Dental Disease in Pets
Because pets hide pain so well, dental disease often advances significantly before owners notice obvious signs. Watch for:
- Bad breath (halitosis) — not occasional, but consistently unpleasant
- Yellow or brown buildup on teeth, particularly near the gumline
- Red, swollen, or bleeding gums
- Drooling more than usual, or drooling blood-tinged saliva
- Pawing at the mouth or face
- Dropping food while eating, or reluctance to eat hard kibble
- Chewing on one side of the mouth
- Facial swelling, particularly below the eye (can indicate tooth root abscess)
- Behavioral changes — increased irritability, withdrawal, or reduced playfulness
Any of these signs warrants a veterinary examination.
Prevention: Daily Toothbrushing
Daily toothbrushing is the single most effective thing you can do to prevent dental disease in your pet. It removes plaque before it can harden into tartar, prevents gingivitis, and dramatically reduces the frequency of professional dental cleanings needed.
Getting started: most adult pets will accept toothbrushing if introduced gradually and positively. Start by letting your pet lick pet-safe toothpaste (never human toothpaste — the fluoride and xylitol are toxic to pets) from your finger. Progress to rubbing your finger along the teeth and gums. Then introduce a soft pet toothbrush or finger brush.
Focus on the outer surfaces of the teeth (the side facing the cheek) — this is where plaque accumulates most and where your pet is most likely to tolerate contact. You don’t need to brush the inner surfaces.
Make it positive — use high-value praise and a small treat reward after each session. Keep sessions short initially (30 seconds) and gradually extend. Consistency over time is more important than perfect technique.
The ideal frequency is daily. Even 3–4 times per week provides significant benefit over no brushing at all.
Dental Chews and Toys
While not a replacement for toothbrushing, dental chews and certain toys provide mechanical abrasion that helps reduce plaque buildup. Look for products carrying the Veterinary Oral Health Council (VOHC) seal — this indicates the product has been tested and shown to provide meaningful plaque or tartar reduction.
Effective options include enzymatic dental chews for dogs, rubber chew toys with textured surfaces, and raw carrots for dogs (a natural, low-calorie dental chew). For cats, dental treats and specific dry food formulations designed for dental health can help.
Avoid items hard enough to crack teeth — a general rule is that if you wouldn’t feel comfortable hitting yourself on the knee with it, it’s too hard for your pet’s teeth. This rules out real bones, antlers, hooves, and very hard nylon toys.
Dental Diets
Certain prescription and over-the-counter dental diets are formulated to reduce plaque and tartar through a combination of kibble size, texture, and fiber orientation that provides a scrubbing action as the pet bites through it. Some also contain polyphosphate coatings that inhibit tartar mineralization.
Again, look for the VOHC seal when choosing dental diets or treats. These have been tested and shown to work.
Water Additives
Water additives are liquid solutions added to your pet’s drinking water that help reduce oral bacteria and plaque. They’re tasteless, odorless, and require no effort from you or your pet beyond adding them to the water bowl daily. While not as effective as toothbrushing, they provide supplemental benefit and are a useful addition to a comprehensive dental care routine.
Professional Dental Cleanings
Even with excellent home care, most pets benefit from professional dental cleanings every 1–3 years. Only a professional cleaning performed under general anesthesia allows thorough cleaning above and below the gumline, probing for periodontal pockets, dental X-rays to evaluate below-surface disease, and extraction of severely affected teeth when necessary.
Many owners are concerned about anesthesia, particularly in older pets. Modern anesthetic protocols are very safe, and the health risks of untreated dental disease — pain, systemic infection, organ damage — typically far outweigh the small risks of anesthesia in a properly screened patient. Your veterinarian can discuss your individual pet’s specific risk factors.
Starting Dental Care in Puppies and Kittens
The best time to start dental care is when your pet is young, before habits and resistance are established. Begin handling your puppy or kitten’s mouth, lips, and teeth from the earliest days — this normalizes the experience and makes introducing toothbrushing much easier.
Note that puppies and kittens have baby teeth that are replaced by permanent teeth between 3–7 months of age. Retained baby teeth (baby teeth that don’t fall out when permanent teeth erupt) can cause overcrowding and accelerated dental disease — your veterinarian will check for this during routine visits.
Dental Care for Senior Pets
Senior pets are at higher risk for dental disease due to years of plaque and tartar accumulation, reduced immune function, and the increased prevalence of other systemic conditions that can affect oral health. Regular dental assessments become even more important as pets age, and pain management should always be part of the conversation when dental disease is present.
→ Read Next: The Complete Guide to Pet VaccinationsThe Bottom Line
Dental disease is the most common health problem in dogs and cats — and one of the most preventable. Daily toothbrushing, appropriate dental chews and toys, and regular professional cleanings form a comprehensive dental care program that protects not just your pet’s mouth but their overall health and quality of life. Start now, be consistent, and your pet’s breath, comfort, and long-term health will all benefit.
Emma Hartwell is a lifelong animal lover, certified pet nutritionist, and experienced dog trainer with over 8 years of hands-on experience working with animals of all kinds. She founded InnerzNews to give pet owners access to honest, practical, and science-backed advice — because every animal deserves the best possible care. When she’s not writing, Emma is hiking with her two rescue dogs, Milo and Biscuit, or volunteering at her local animal shelter.