These are two different bets on how to get a dog's teeth cleaner. A brushless chew is built around a toothpaste-style center, so the dog's chewing spreads paste across the tooth surfaces while a textured outer shell does the scrubbing. A starch-based extruded chew relies on texture alone: dough is forced through a die, puffed, dried, and shaped so it scrapes as the dog works it. One approach adds a paste step. The other skips it and leans entirely on friction.
What "brushless" is actually describing
The word points at a design goal, not a magic ingredient. A brushing session works because bristles carry a paste into contact with enamel. A brushless chew tries to reproduce both halves at once: the chew provides the scrubbing motion, and the center provides the paste.
Ark Naturals' Brushless Toothpaste is the plain version of that idea. Protection+ carries the same center plus an Asta-Shield coating, which is where the astaxanthin comes in.
How starch-based extruded chews are made
Extrusion is a food-manufacturing process borrowed from cereal and kibble production. Starch, water, glycerin, and binders go into a barrel; heat and pressure gelatinize the starch; a die shapes the ribbon on the way out. The finished chew is springy and slightly glossy, and it holds a shape well.
Nothing about that process is bad. It is efficient and it produces a consistent product. The limitation is that the whole cleaning story has to come from geometry, because there is no separate paste phase.
The paste step is the real difference
Friction cleans the parts of a tooth the chew physically touches. Paste can spread a little further, including onto surfaces the chew glances past rather than presses into. That is the argument for the brushless design, and it is a modest, physical argument rather than a dramatic one.
Neither approach reaches under the gumline. Nothing a dog chews does.
Side by side
Chew time is the variable that matters
A chew that vanishes in fifteen seconds cleaned almost nothing, regardless of category. Watch your dog for one session with a stopwatch. If the answer is under a minute, size up.
Extruded chews often win on duration for power chewers because they compress instead of snapping. Firmer paste-center chews tend to give more contact per second while they last. Different trades, same goal.
Calories and the treat budget
Dental chews are food. A common nutrition guideline holds that treats should stay under roughly ten percent of a dog's daily calories, and a daily dental chew can eat most of that allowance in a small dog. The AKC's nutrition library is a reasonable place to read up on how treat calories fit into a day.
If you add a daily chew, trim the dinner bowl slightly. Owners skip this step and then wonder about the extra two pounds.
Reading the ingredient panel
Look at the first three ingredients and the placement of glycerin. Look for an abrasive with a known role, such as baking soda or a calcium salt. Look for a size range printed on the bag rather than a vague "for all dogs."
If a product carries the Veterinary Oral Health Council seal, its list is public at the VOHC accepted-products registry. Absence from that list is not proof of anything, and presence on it is not a promise about your individual dog.
Dogs who need the softer end
Seniors with worn crowns, dogs recovering from extractions, and small dogs with sore gums often do badly with anything firm. Soft Shield exists for that group. Before switching a dog with an obviously painful mouth onto any chew, get your veterinarian to look inside first; pain is information, and a chew is not the answer to it.
Supervision, honestly
Both categories can be swallowed in large pieces by an enthusiastic dog. Stay in the room. Take away the last stub. That habit costs nothing and prevents the situation nobody wants.
Which approach for which dog
Dog refuses a toothbrush and has a normal, healthy mouth: the paste-center route makes sense. Dog is a demolition specialist who reduces everything to crumbs instantly: a denser extruded product may last long enough to matter. Dog has a diagnosed dental problem: neither category is the plan, and your vet sets the plan.
FAQ
Does a brushless chew really replace brushing?
It replaces the effort, not the gold standard. Brushing with a canine paste still contacts more surface area. A daily chew is the realistic option for the large number of dogs who will never accept a brush.
Are starch-based chews bad for dogs?
Not inherently. They carry more digestible carbohydrate than a meat-based chew, which matters for dogs on a controlled diet. Check the panel and count the calories.
How long before I see a difference in my dog's breath?
Odor usually shifts within a couple of weeks of consistent daily chewing. If it does not, or if it gets sharper, that is worth raising with your vet rather than doubling the dose.
Can I use both types?
You can alternate, though a single daily routine is easier to keep. Compare the options across the full Ark Naturals range and pick one you will actually give every night.