Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

What Are By-Products in Dog Food? Vet-Reviewed Facts & Info

Share

Dalmatian dog eating dry food from a bowl

I spend more time and consideration making sure the pet food I choose is good quality than I do my food. I check protein, fiber, and other nutrient ratios while trying to decipher the ingredients.

As with processed human food, it can be difficult to translate exactly what is in the ingredient list of the food, but one ingredient that I see labeled often is by-products. This can be chicken or another meat by-product. It is sometimes even labeled as a “meat by-product”, although you will see cereal and vegetable by-products, too.

divider dog paws oct 2024

What Are By-Products?

By-products are the bits that are left over after the original ingredient has been processed and prepared for use in another food. Traditionally, this means that the by-products are ingredients that are not considered fit or desirable for human consumption but can be used to turn into animal feed.

Organs like lungs, livers, and even intestines can be good for dogs, even though people turn their noses up at the ingredients. In this regard, by-products are not inherently bad in dog food.

However, as well as including organs and parts of the animal that people rarely eat, by-products might also be considered unfit for human consumption because of the way they have been handled or the way the animal died. If this is the case, the by-product needs to be heat treated or “rendered” to ensure no harmful bacteria remains in the final product.

This means that by-products are not necessarily unsafe for canine consumption, either. The big problem with the use of by-products is the vague labeling, especially with the most generic of ingredients, meat by-products.

dry dog food in bowl
Image Credit: 279photo Studio, Shutterstock

The Case for By-Products as Dog Food Ingredients

The term “by-products” does not mean that an ingredient is inherently bad for dogs. With meat by-products, it can mean offal and organs that are not normally consumed. These can be packed with nutrients including some vitamins and minerals that are essential to a dog’s good health. In the wild, dogs would consume virtually every part of a prey animal.

Consuming by-products also means using more of the animal or other food product, which means less waste. This is better for the environment and is more sustainable. However, most people won’t eat organs like hearts and intestines, which means these parts of animals will often go to waste.

As well as using up otherwise wasted products, by-products tend to be available for cheap. This can help keep the cost of pet food down. If you’re shopping on the budget end of the dog food scale, you will likely find more instances of by-products in the food.

The Case Against By-Products as Dog Food Ingredients

Unfortunately, “by-products” don’t only refer to otherwise unwanted types or cuts of meat. It can also mean that the meat has not been handled or stored properly. It may be left out before it is gathered or used, without adequate refrigeration or storage. The animals may have also died from means other than slaughter. This can lead to an increase in bacteria, which is why it needs to be processed correctly before being put into the dog food. There are pet food recalls that arise as a result of bacteria and other problems that may have been caused by unsanitary food handling conditions, although this is not necessarily due to “by-products” being used.

The term “meat by-products” does not give any indication as to the type of animal that the meat came from. If your dog is one of the small number that has food allergies or intolerances that are triggered by a particular meat product, there is no way of telling whether the food contains the offending ingredient until it is too late.

By-products are cheap ingredients. There is no guarantee that the by-products have been handled well or even that they contain the protein, vitamins, and minerals that you would expect from whole foods or the original food source. Although they are most often found in budget foods, you can still find some by-products in expensive dog foods, which keeps the cost of manufacturing the food down, but only benefits the manufacturer.

Dogster divider_v1_NEW_MAY_24_

3 Tips to Choose the Best Dog Food

Diet and nutrition are closely linked to health and general well-being. That’s as true of dogs as it is of people, and it means that you should find the best food available for your dog that meets your budget. Some tips to help ensure you give your dog a good diet include:

1. Buy According to Life Stage

Puppies and senior dogs have different nutritional requirements from one another and adult dogs. The Association of American Feed Control Officials (AAFCO) does not stipulate the nutrient profile of senior dog foods, so we recommend asking a veterinarian about the best option for your senior dog. As well as needing different amounts of protein and calories, dogs at different stages of life need different amounts of vitamins and minerals. Choose a food that matches your dog’s life stage but still check the nutritional ratings to be sure that it is suitable for your pup.

You can even choose a food that is targeted at your dog’s specific breed or the type of dog you have, for example, a working dog. Some foods contain or exclude ingredients according to certain illnesses or conditions.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the personalized advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1


2. Ensure Animal Products Are Among the First Ingredients

Dogs are omnivores. This means they can and should eat a combination of ingredients derived from plants and animals, but animal ingredients are high in protein, and they contain some essential amino acids that are very difficult to get from other sources.

While looking at the ingredient list, ensure that animal derivative ingredients are at the top of the list. The top two or three ingredients will typically make up the bulk of the food.


3. Monitor Your Dog

When introducing your dog to any new food, take it slowly and transition your pup from their old food to their new food gradually. This will help avoid upset stomachs. Even if the transition is going smoothly, and you have moved over to the new food, keep an eye on things like stool formation but also signs like coat condition and general energy levels for your dog.

Negative changes in such factors can be a sign of an inferior food.

feeding dry kibble to a dog
Image By: Krasula, Shutterstock

divider dog paws oct 2024

Is Wet Food Better for Dogs Than Dry Food?

Most dogs can thrive on a dry-food diet and there are pros and cons of wet and dry food. Dry food is generally cheaper and helps with dental health. Wet food is sometimes more palatable and boosts hydration due to the moisture content. Whatever type of food you choose, ensure it is AAFCO approved and meets the nutritional requirements of your dog according to age, life stage, dog type, and general condition.

What Ingredients Should I Avoid in Dog Food?

This mainly comes down to personal preference. If your dog food contains AAFCO approved ingredients, there is sufficient evidence that they are not immediately harmful to your dog. Some people prefer to avoid by-products and stick to natural preservatives like tocopherols.

You can also avoid artificial colors. There is no reason to color dog food. Your pup has no preference when it comes to food color, so these ingredients are only added to make the food more appealing to human owners.

divider dog paws oct 2024

Conclusion

There is a strong link between the food you feed a dog and the general health and well-being of the pup. Good food, that is appropriate for your dog’s circumstances, gives a better chance of a healthy and long life. Poor-quality food that isn’t appropriate for your pup increases the likelihood of illness and poor general condition.

Although by-products are not inherently bad, the term is very vague. Ultimately, it is up to you whether you feed food that contains by-products, however, and there are plenty of foods that do contain these ingredients, as well as many that do not.


Featured Image Credit: Sergey Fatin, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Dogster's Digital Magazine is Back!​

Dogster Magazine Cover June 2026

Vet-approved health & behavior advice

Real dog stories & community features

Ask Dr. Paola- Help! My Vet Suggests a Biopsy for My Dog! (June 15, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Some Dogs Treat Mealtime Like Playtime – And When to Pay Attention

Most dogs are reliable eaters. Bowl goes down, food disappears. So when a dog starts batting kibble across the kitchen floor, tossing pieces...

Major Win for Dogs: Ontario Becomes the Final Province to Ban Ear Cropping and Debarking

​​Ontario has approved new animal welfare regulations that will prohibit elective ear cropping and devocalization (debarking) procedures in dogs from January 1, 2027....

Dogster’s Weekly Photo Contest Winners: Most Adorable Puppy (June 8, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

More related

Can Dogs Eat Provolone Cheese? Vet-Verified Nutrition Facts & FAQ

Many foods aren’t necessarily toxic or poisonous to dogs, but they’re still not very good for them to eat. Cheese is one of...

8 Off-Leash Dog Parks in Chesterfield, MO You Can Visit in 2026

If you live in an apartment in the city or you don’t have a yard, dog parks offer an opportunity to exercise your...

Can You Be Allergic to Dogs & Not Cats? Our Vet Answers

Animal hair is all the same, right? Nope! So, yes, you can be allergic to dogs and not cats. Your immune system is...

How to Introduce Dogs in 9 Vet-Approved Steps

Some dogs can meet all other canines, tails wagging and sniffers going 100 miles an hour. Others will react in a more standoffish...

Keep reading

Can Dogs Eat Ants? Vet-Verified Facts & FAQ

As curious animals, dogs are bound to eat ants at some point in their life. Those little insects that you need to protect your sugary foods from can be found everywhere. Your dog is likely going to eat ants from...

Can Dogs Eat_Ants

9 Best Dog Foods for Maltipoos in 2026 – Reviews & Top Picks

Maltipoos are gorgeous little designer dogs that are crosses between a pure-bred Maltese and a Toy Poodle. They are well-behaved, loving, and eager to please their owners. As a pet parent, you probably already know that small breeds need a...

Maltipoo-puppy-eats-from-a-metal-bowl

Can Dogs Eat Edamame Beans? Vet-Verified Nutrition Facts, Benefits & More

Our canine companions always want some of whatever we’re eating, no matter what it is. And while it’s fine to feed your pet a bite of your food occasionally, it shouldn’t be done often, and you shouldn’t do so with...

Dogster-Can-Dogs-Eat-Edamame Beans

How Much Food to Feed a Golden Retriever (Puppy & Adult Guide)

Feeding your Golden Retriever involves a lot of variables, many of which are largely dependent on the individual pup. Your dog may vigorously chomp down all of their kibbles the second they hit the bowl or may snobbishly languish around...

Golden Retriever eating

Can Dogs Eat Fritos? Vet-Reviewed Facts & FAQ

Dogs aren’t well-known for their pickiness, and it’s up to owners to monitor the food they can access. Just as you wouldn’t eat a bowl of Purina, your pup shouldn’t be making a habit of feasting on the foods we...

Can Dogs Eat_fritos

Can Dogs Eat Onions? Vet-Verified Toxicity & Safety Tips

Dogs are often indiscriminate about what they eat, so we have to be careful with what types of snacks and table scraps we feed them, as they may contain ingredients that are harmful to dogs. One common food to avoid...

Can Dogs Eat Onions

10 Best Dog Foods for Great Pyrenees in 2026 – Reviews & Top Picks

Great Pyrenees are wonderful and gentle dogs that quickly become beloved family members. These unique dogs also require a special diet to promote their well-being and prolong their lifespan. The first and most obvious factor to consider is their size....

great pyrenees in the mountain

How Much Should I Feed My Corgi? Vet-Reviewed Feeding Guide

Most Corgis love to eat. They’re food-driven, and there’s nothing wrong with that! But while you’ll never have to question how to motivate your Corgi, one thing you might have to worry about is their overeating. Corgis always want to...

Hungry Welsh corgi Pembroke or cardigan puppy eats from ceramic bowl standing on fleecy carpet

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter