Most dog treat labels are written to be reassuring, not informative. "Natural flavors." "Premium ingredients." "Wholesome goodness." These phrases are not regulated and mean nothing beyond what the marketing team decided they should mean.
What actually matters is the ingredient list. Here is a guide to the specific ingredients worth avoiding — and why.
Ingredients to Avoid
BHA and BHT (Butylated Hydroxyanisole and Butylated Hydroxytoluene)
Synthetic antioxidants used as preservatives in fats. BHA is classified as a possible human carcinogen by the World Health Organization and the National Institutes of Health. BHT has similar concerns. Both are still legal in pet food at regulated levels. Safer alternatives — like mixed tocopherols (Vitamin E) — exist and are used by better brands.
Ethoxyquin
A synthetic preservative originally developed as a rubber stabilizer and pesticide. Used in pet food and treats to prevent fat oxidation. Banned in human food in the European Union. If you see it on a label, put the treat down.
Xylitol
A sugar alcohol used as a sweetener in human food products that is highly toxic to dogs — even in small amounts. It causes a rapid insulin release that leads to hypoglycemia, and can cause liver failure at higher doses. It appears in some "dental" dog treats. Check labels on anything marketed as low-calorie or sugar-free.
Propylene Glycol
A humectant used to keep semi-moist treats from drying out. The FDA restricts its use in cat food because cats process it differently than dogs, but it is still permitted in dog food and treats. It provides no nutritional value and is derived from petroleum. Avoid.
Artificial Colors (Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2)
Dog treats do not need to be red, orange, or yellow. Dogs are partially colorblind — they do not make food decisions based on color the way humans do. Artificial dyes in dog treats are entirely for the owner's perception, not the dog's benefit. Some are linked to hyperactivity and behavioral changes in both humans and animals.
Corn Syrup and Added Sugar
Used to increase palatability and act as a preservative in some treats. Adds calories with zero nutritional value and can contribute to obesity, dental disease, and blood sugar instability — particularly in smaller dogs.
Glycerin
A humectant used to keep treats moist and chewy. Glycerin itself is not inherently dangerous, but it can loosen stools in sensitive dogs and is a common hidden trigger for digestive issues. It is also frequently derived from palm oil, which has environmental concerns. Look for it near the end of ingredient lists — it is almost always filler.
"Natural Flavors" (Unspecified)
"Natural flavors" is an FDA-permitted catch-all term that can legally include rendered animal parts, plant extracts, fermentation byproducts, and dozens of other compounds — as long as they originally came from a natural source. The term tells you almost nothing about what is actually in the treat. Brands that use it instead of naming the specific ingredient are usually hiding something they know would put buyers off.
Meat By-Products and By-Product Meal
By-products are the parts of an animal left after the muscle meat is removed: feet, undeveloped eggs, intestines, lungs, spleen, kidneys, heads, and similar. Not all of these are bad — kidneys and liver are nutritious organ meats. But the "by-product" designation lumps the nutritious with the not-nutritious, and the composition varies batch to batch. Single-ingredient treats with named ingredients are always preferable.
What to Look for Instead
The ideal dog treat ingredient list is short and specific. Ideally, it contains one ingredient you would recognize without explanation. "Beef liver." "Chicken breast." "Pork loin." No qualifiers, no secondary ingredients, no preservatives required because the drying process handles preservation naturally.
That is the standard we hold at Fed by Nature: one ingredient, human-grade, air-dried. If we would not eat it ourselves, it does not go in the bag.
What We Put in Our Treats (and Nothing Else)
Every Fed By Nature treat contains one ingredient. No BHA, no BHT, no glycerin, no artificial colors, no corn syrup. Just the protein on the label.