Ingredient Guide
What's Actually in Your Dog's Treats? An Honest Look at the 10 Best-Sellers.
Most of America's most popular dog treats contain ingredients banned in pet food across the EU. We pulled every label and broke down what's really in there — so you can read the back of any bag like a pro.
Here's something most dog owners have never actually done: flipped the bag over and read the ingredient list.
We did. For ten of the most popular grocery-store treats — Milk-Bone, Pup-Peroni, Beggin' Strips, Greenies, Snausages, and six others. What we found surprised even us.
The same handful of synthetic preservatives, artificial dyes, and chemical humectants appear over and over across the category. Some are banned in pet food across the European Union, the United Kingdom, and Japan. One is FDA-banned in cat food but legal for dogs. Another is the same compound used in (the non-toxic kind of) automotive antifreeze.
This is the guide we wish someone had handed us when we started PurePup Pantry. By the end of it, you'll be able to read any dog treat label in thirty seconds and know exactly what you're feeding your dog.
The 6 ingredients you don't want in your dog's treats
These are the repeat offenders. Every "questionable" ingredient on our list of the top ten brands fell into one of these six categories. Here's what each one is, why brands use it, and why we don't.
BHA & BHT (Synthetic Preservatives)
High concernWhy brands use them: They keep fats from going rancid on a warehouse shelf. Cheap, effective, and the default in any treat designed to last a year in a cardboard box.
Why we don't: The U.S. National Toxicology Program lists BHA as "reasonably anticipated to be a human carcinogen." The International Agency for Research on Cancer classifies it as a known animal carcinogen — it produces tumors in lab rats and mice. Both BHA and BHT are banned in pet food across the EU, the UK, and Japan. Dogs eating the same treats every day face cumulative exposure that humans, with varied diets, don't.
Propylene Glycol
Medium concernWhy brands use it: It's a humectant — keeps soft, chewy treats moist and pliable on a shelf. Standard in jerky-style and "soft-baked" treats.
Why we don't: It's the same compound used in the non-toxic version of automotive antifreeze. The FDA classifies it as Generally Recognized As Safe (GRAS) for dogs, but banned it from cat food after it was shown to cause Heinz body anemia. If you have a cat in the house who might snag a dog treat off the floor, that's a real problem. Our recipe doesn't need a humectant, so we don't use one.
Artificial Dyes (Red 40, Yellow 5, Yellow 6, Blue 1)
Medium concernWhy brands use them: Pure cosmetics. The dyes make a treat look like bacon, steak, or a rainbow — so you reach for it on the shelf.
Why we don't: Dogs are red-green colorblind. They can't see the color and they don't care what shape the treat is. The dyes have been linked to hypersensitivity reactions, hyperactivity, and cell damage in lab animals. The FDA is currently phasing out petroleum-based dyes in human food. It's a strange thing to leave in a product made for someone who literally can't see them.
Added Sugar & Corn Syrup
Medium concernWhy brands use it: Cheap palatability boost. Sugar makes dogs want the treat — and want more of it.
Why we don't: Empty calories that contribute to obesity, type-2 diabetes risk, and dental disease (sugar feeds the bacteria behind tartar and gum disease). Roughly 1 in 2 U.S. dogs is overweight or obese, and daily sweetened treats are a known driver. Sweet potato is naturally sweet enough — and packs fiber and beta-carotene while it's at it.
Titanium Dioxide
High concernWhy brands use it: Whitens cheese-flavored or pale ingredients so they look more appealing on the shelf.
Why we don't: In 2021, the European Food Safety Authority concluded titanium dioxide is no longer safe as a food or feed additive, citing genotoxicity concerns the panel couldn't rule out. The EU has since banned it in both human food and pet food. It's still permitted in U.S. pet food. We think that's a strange place to draw the line.
Meat & Bone Meal / Unnamed By-products
High concernWhy brands use it: A rendered ingredient — animal tissue plus bone, ground and dried. Cheap source of protein and minerals.
Why we don't: The quality varies enormously by supplier. Lower grades can include "4-D" meat — dead, dying, diseased, or disabled livestock — and in some cases even euthanized animals. The FDA has documented pentobarbital (a euthanasia drug) residues in some pet food ingredients. Even at best, a significant share of the "protein" is collagen, which lacks essential amino acids.
How the 10 best-sellers actually stack up
Here's the side-by-side. We didn't cherry-pick — these are the bag-back ingredient panels, straight from each brand's website and Chewy's product pages.
Side-by-side comparison of flagged ingredients across the top mass-market dog treats.
A few things jump out:
- Every single one of the four leading mass-market brands contains BHA — the preservative banned across the EU.
- Every one of them contains added sugar or corn syrup. No exceptions.
- Three out of four contain propylene glycol, the FDA-banned-for-cats humectant.
- Snausages alone contains nearly every flagged ingredient on the list — including titanium dioxide and three artificial dyes.
"If you wouldn't eat it yourself, why would you feed it daily to a 30-pound family member?"
Why we make PurePup the way we do
When we started PurePup Pantry, the question wasn't what should we put in our treats? It was what would we be comfortable feeding our own dogs, every single day, for years?
The answer was a short list:
- Sweet potato. Whole-food source of fiber and beta-carotene. Naturally sweet — no added sugar required.
- Rolled oats. Gentle on digestion, no wheat gluten, no corn fillers.
- Nothing else. No synthetic preservatives. No humectants. No dyes. No corn syrup. No rendered "meat" of mystery origin.
That short list is the whole product. It's also why we got Georgia Department of Agriculture approval — every batch is made and inspected here in Georgia, in small runs we can stand behind by name.
It would be cheaper to add BHA and bump our shelf life. It would be flashier to dye them bacon-pink. We just don't see the point.
Try a bag. See the difference.
Two ingredients. Made in Georgia. State-inspected. Loved by very picky dogs.
New customers get 10% off the first bag with code CLEAN10.
Shop PurePup Treats →How to read any dog treat label in 30 seconds
Even if you never buy from us, take this with you. Here's the quick scan we use on every bag we pick up.
The 30-second label test
- Count the ingredients. If it's more than ten, ask why. A treat shouldn't need 25 ingredients to do its job.
- Scan for BHA, BHT, or "ethoxyquin." Synthetic preservatives. If you see them, put the bag back.
- Look for "propylene glycol" or "glycerin." Both are humectants. Glycerin (especially "vegetable glycerin") is the gentler option; propylene glycol is the one you want to avoid.
- Hunt for color codes. "Red 40," "Yellow 5," "Yellow 6," "Blue 1," "Blue 2," and the generic phrase "added color" are all artificial. Dogs don't care; skip them.
- Check the first three ingredients. Ingredient lists are ordered by weight. If sugar, corn syrup, wheat flour, or "meat by-product meal" is in the top three, that's mostly what your dog is eating.
- Look for a state inspection or AAFCO statement. Reputable small-batch makers will name their inspecting agency on the bag. We use Georgia Dept. of Agriculture.
Frequently asked questions
Is BHA really that bad? My dog has eaten Milk-Bones for years.
Many dogs do eat BHA-preserved treats without an obvious short-term reaction. The concern is long-term and cumulative — the National Toxicology Program flagged BHA based on chronic-exposure studies, and dogs eating the same treats daily for years are exactly the chronic-exposure profile that worries regulators. The EU, UK, and Japan thought the risk profile was enough to ban it in pet food. We agree.
If propylene glycol is FDA-approved for dogs, why avoid it?
It's a "different species, different rules" call. The FDA approves it for dogs but bans it in cat food because cats develop Heinz body anemia from it. If you have a cat at home who could grab a dog treat off the floor, you have a problem the package never warns you about. We just don't use it.
How long do PurePup treats last without preservatives?
Six to eight weeks at room temperature once opened, longer in the fridge. We bake in small batches, ship fresh, and don't try to engineer a 12-month shelf life. The trade-off is on purpose.
My dog has allergies. Are PurePup treats safe?
Two ingredients makes it easy to check: sweet potato and rolled oats. No wheat, no soy, no corn, no dairy, no chicken, no beef, no preservatives, no dyes. If your dog tolerates oats, they should tolerate PurePup. Always check with your vet for serious allergies.
Where are PurePup treats made?
In Georgia, in small batches, by us. Every batch is registered and inspected through the Georgia Department of Agriculture.
Two ingredients. One happy dog.
If you've made it this far, you care about what's on the back of the bag. So do we. Try PurePup — and if your dog doesn't agree, we'll refund the order. No questions.
Shop the Treats →Or read our story — why a marketing person and a hungry mutt started a treat company.
Sources: manufacturer ingredient panels pulled from each brand's website and Chewy product pages (May 2026); U.S. National Toxicology Program Report on Carcinogens (BHA listing); European Food Safety Authority opinion on titanium dioxide (2021); FDA Center for Veterinary Medicine guidance on propylene glycol; Schweizer Archiv für Tierheilkunde on sulfite-induced thiamine deficiency in dogs. This article is intended as consumer education, not veterinary advice. Talk to your vet about your dog's specific needs.
