Bully Sticks for Dogs' Teeth: 2026 Sizing and Safety Tips

Periodontal disease is the most common health problem in adult dogs. By age three, an estimated 80% of dogs show some degree of gum disease. The bacterial film that drives it begins building on the teeth within hours of every meal.

Daily brushing is the gold standard, but few owners manage it consistently, so natural chews have become a practical line of defense.

Bully sticks, made from a single ingredient (beef pizzle), sit at the center of that conversation. The question isn't whether they help. The question is how much, for which dogs, and under what conditions. This guide answers all three, including what the Rutgers University study actually measured and where bully sticks fit alongside brushing and professional cleaning.

This guide covers the dental impact of bully sticks for healthy adult dogs. For puppies, see when puppies can start chewing bully sticks.

Why your dog needs to chew in the first place

Chewing is not a habit dogs pick up. It is wired in by anatomy and selection pressure, and adult dogs without an outlet for it tend to find one anyway, usually a shoe or a baseboard. After making chews since 2018, we see three drivers behind every long chew. The first is mechanical: jaw muscles, ligaments, and tooth-surface contact need regular load to stay healthy, and chewing supplies all three at once.

The second is neurological. Rhythmic chewing releases endorphins and lowers cortisol in dogs, which is why a tense dog often gravitates to a chew when something stressful is happening (a thunderstorm, fireworks, an empty house). Chewing is a self-regulation tool dogs use without being taught, and a 30-minute chew works on the nervous system as much as it works on the teeth.

The third is predatory. Domestic dogs still carry the prey-handling sequence of their ancestors (bite, hold, tear, gnaw), and a long chew completes that sequence harmlessly. Once you see chewing as a need three layers deep, a bully stick stops looking like a dental product that happens to be a chew. It is a chew that delivers dental impact as the downstream effect of meeting a biological requirement.

How bully sticks help clean teeth

Bully sticks clean teeth through two mechanisms that work together every time a dog chews.

The first is mechanical abrasion. The fibrous structure of dried beef pizzle creates friction against the tooth surface, particularly along the molars and premolars where most plaque accumulates.

As the chew is worked across the teeth, it physically disrupts soft plaque before it can mineralize into tartar. Once tartar hardens, only a veterinary dental cleaning can remove it. The window for chewing to intervene is short, which is why daily, consistent chewing matters more than the occasional long session.

The second is increased salivary flow. Extended chewing stimulates the salivary glands, and canine saliva carries natural antibacterial properties that act against the strains responsible for plaque formation.

Saliva also acts as a physical rinse, washing away food debris that would otherwise feed oral bacteria. This is part of why chews that last 20 minutes or longer outperform quick treats for dental impact. The cleaning effect compounds with chew duration.

Quality matters as much as mechanism. A bully stick made from single-ingredient beef pizzle, properly dried, behaves predictably during chewing. One processed with chemical treatments, masked for odor, or rushed through drying can crumble, splinter, or harbor surface bacteria, undermining the dental benefit entirely. Here is what a quality bully stick is actually made of.

What the Rutgers research shows

One of the few studies to measure the dental effect of bully sticks directly came out of Rutgers University–Camden in 2014. Researcher Lindsay Gallagher, working in the Department of Biology, compared four common interventions for canine oral hygiene: toothbrushing with an enzymatic paste, a plant-based dental chew, bully sticks, and raw marrow bones. Each treatment was applied in a single session, with oral bacteria measured before and after.

The results placed bully sticks firmly within the same effective range as the established dental products:

The takeaway is straightforward: a single chewing session reduced oral bacteria by 60.2%, and the study found no meaningful difference between bully sticks, brushing, dental chews, and raw bones. All four interventions worked.

Two notes worth pulling out of that result.

First, the four methods are statistically equivalent at reducing oral bacteria in a single session. That puts bully sticks alongside brushing and the established dental products in the same effective tier.

Within that tier, what you are handing your dog matters. Natural Farm bully sticks are single-ingredient grass-fed beef pizzle, naturally odor-free, with no artificial additives or preservatives, and rich in protein.

Toothbrushing pastes are formulated products. Plant-based dental chews carry binders and flavorings to hold their shape. Bully sticks are just dried meat.

Second, raw marrow bones ranked highest in mean reduction, but they sit in a different sizing category. Bones are denser than soft-tissue chews, best matched to medium-to-large dogs with the jaw strength to work them safely, and usually not the right pick for small breeds. That is why this guide leans on bully sticks for the broader dental use case.

If you want to explore bones as a category for a medium-or-large dog, see the Natural Farm dog bones collection.

What bully sticks do and do not do

The expectation has to be set correctly. Bully sticks are an effective complement to dental care, not a replacement for it.

Bully sticks work best as one tool inside a broader dental care system, alongside brushing when possible, water additives, dental-focused diets, and annual veterinary checkups.

When bully sticks may not be a good fit

The benefit comes with conditions. There are specific situations in which bully sticks are not the right choice, and recognizing them is part of responsible chewing.

Dogs with existing dental problems. A dog with a fractured tooth, advanced periodontal disease, recent dental surgery, or known tooth pain should not be given a hard chew without veterinary guidance. The pressure of biting down on a dense bully stick can worsen damage that is already present.

Aggressive chewers paired with the wrong size or hardness. A bully stick that is too small or too dense for a powerful jaw can produce a slab fracture, a vertical crack along one of the large rear teeth, often requiring extraction. This is the single biggest dental risk associated with bully sticks, and it is almost always avoidable through proper sizing. The post on when bully sticks can fracture a tooth covers the warning signs in detail.

Very young puppies. Puppies under six months have developing teeth and jaws that are not ready for dense, long-lasting chews. Softer alternatives are more appropriate during the teething phase.

Dogs with a history of choking or swallowing whole. Some dogs swallow the final inch of a chew rather than chewing it down. For these dogs, supervision and removing the chew when it reaches a small nub matter more than the chew choice itself.

Matching size and hardness to your dog

The right bully stick depends on the dog. Three variables matter most: body size, chew style, and chew duration.

For most dogs in the moderate-chewer group, a standard 6-inch or 12-inch bully stick covers the use case without overthinking it.

Power chewers are the segment that struggles with standard bully sticks. The density of a regular pizzle is calibrated for medium chewers, so a dog with serious jaw power can shred it in minutes. That limits dental benefit and increases choking risk.

For this group, the Natural Farm Cold-Dried™ Bully Sticks are built specifically as an upgrade. A proprietary low-temperature drying process produces a chew with up to 97% crude protein and roughly 45 to 90 minutes of chew time, about double a standard stick of the same size.

The increased density is the point. It slows the dog down enough for the dental cleaning action to actually occur.

Meet Cold-Dried™, made for power chewers

Safe chewing practices

The dental benefit of any chew assumes the chewing is safe. A few practices make a measurable difference.

Supervise the chew session, especially the first few times with any new product. Owners learn their dog's specific chewing style, fast vs. slow, swallower vs. nibbler, only by watching.

Remove the chew when it reaches a small piece, generally around 2 to 3 inches for a 6-inch stick. The nub at the end is the most common choking and swallowing hazard. A bully-stick holder or clamp can help by making the final piece harder to swallow whole and effectively extending the usable length of every chew. It is not a product Natural Farm sells, but it is worth considering, particularly for dogs that have a history of gulping treats. For exact removal thresholds, see when to take the bully stick away.

Limit chew duration during the introduction period. Start with 5 to 10 minutes per day for the first week. Some dogs experience temporary digestive upset when introduced to a new high-protein chew, and a gradual ramp-up prevents that.

Provide fresh water during and after chewing. Dried chews absorb water as they are worked, and hydration supports the salivary mechanism that does much of the cleaning.

Common dental mistakes owners make

Most owners get bully sticks right intuitively. The mistakes that derail the dental benefit fall into a handful of predictable patterns.

1. Treating chews as a replacement for brushing. Bully sticks reduce bacterial load between brushings, but they do not reach the gum line where periodontal disease progresses. Brushing stays the foundation when it is feasible.
2. Wrong size for the chew style. A 6-inch thin stick under a power chewer is consumed in minutes; a Standard stick under a small senior is too dense to engage well. Size by chew style, not by what is on sale.
3. Letting the nub get too small. The final inch or two is where choking incidents happen. Pulling the chew at a 2-to-3-inch nub is the single highest-leverage safety habit.
4. Starting a puppy too early. Under six months, adult teeth are still erupting and the jaw is not ready for a dense chew. Softer chews fit the teething phase.
5. Expecting bully sticks to remove existing tartar. They cannot. Once tartar mineralizes, only a veterinary dental cleaning can take it off. Chews keep new plaque from getting there.