Dog food types
Is by-product bad for dogs?
Last updated 23 September 2026 · How we write and check this
Short answer
Animal by-products, organ meats, bone, and other tissues beyond muscle meat, are not inherently bad for dogs and can provide valuable nutrients like iron, vitamin A, and taurine that muscle meat alone does not supply in the same amounts. The concern is more about vague labeling than the ingredient category itself.
What by-products actually include
Organs such as liver, kidney, and spleen, along with bone and connective tissue, count as by-products in regulatory terms, and a wild canid eating whole prey would naturally consume these parts, which are often more nutrient dense than plain muscle meat.
Where the criticism has some merit
A generic by-product meal with no species named offers less transparency about exact composition and quality control than a specifically labeled ingredient, making it harder to judge or trace back to source.
How to judge it on a specific label
Named organ ingredients, such as chicken liver or beef kidney, are generally viewed positively by nutritionists, while unnamed animal by-product or meat and bone meal without species identification is the version worth more scrutiny.
Key takeaways
- By-products like organ meat and bone can be nutritionally valuable, not automatically inferior ingredients.
- The main legitimate concern is vague labeling that hides the specific source species.
- Named organ ingredients are generally a nutritional plus rather than a quality red flag.