What are Animal By-Products in Dog Food?

When choosing dog food, the long ingredient list on the back of the package can be tiring. It's possible to get confused when you see "meat, meat meal, animal fat..." and then also the phrase "animal by-products".

How can there not be confusion? On the internet, you come across harsh comments describing by-products as, so to speak, garbage, as well as opinions that they are extremely nutritious and sustainable. Amidst such conflicting statements, it can be difficult to confidently answer the question, "What are the animal by-products used in dog food?"

Behind the question "What are animal by-products?" lies a more structured and regulated definition than emotional debates. In food and feed legislation, these components are treated as animal components defined and controlled by specific rules. Therefore, not every "animal by-product in dog food" statement you see on the label refers to random and uncontrolled mixtures.

What are Animal By-Products in Dog Food?

The term "animal byproducts" that you see on dry or canned dog food labels generally refers to animal parts that are less preferred as human food but are still considered nutritious for dogs.

These parts are obtained after slaughter and consist of organs, tissues, and some structural parts different from muscle meat. One of the important points in the definition is which parts fall into this group. The focus here is on the organs and tissues that the dog can digest and contribute to its nutrition.

The AAFCO definition places parts other than muscle meat that are not commonly consumed by humans but can be used for feed purposes in the byproduct class. Components such as hair, nails, horns, teeth, digestive system contents, and feces are excluded from this definition; such substances are not considered safe and suitable byproducts.

Tufts University’s assessments in the field of pet nutrition emphasize that organs such as liver and spleen can be formulated in commercial pet foods along with muscle meat due to their high vitamin and mineral content. The controlled use of organ meats provides diversity in the total animal components and can support the micronutrient profile in the formula.

What are the Animal By-Products in Dog Food?

Animal by-products do not consist of a single group. They enter the food with different textures, different nutritional profiles, and different processing methods. Therefore, instead of just looking for “by-product” on the label, it is necessary to read the type and form.

Sakatat (organ etleri)

Offal is a group of organ meats such as liver, spleen, kidney, and tripe. It can offer a concentrated protein source in terms of specific amino acids and vitamin and mineral value. It also adds flavor and nutritional variety to dog food formulas.

Kemik unu

It is a type of byproduct in which minerals, mainly calcium and phosphorus, are concentrated. The calcium-phosphorus ratio in the formula must be carefully adjusted; when the balance is disrupted, skeletal development and metabolic balance may be at risk. Therefore, bone meal is used in controlled amounts.

Blood meal

Blood meal is a component rich in high protein content and important amino acids such as lysine. Processing temperature and times directly affect digestibility and utilization by the body. Therefore, the use of blood meal is considered a type of byproduct requiring process control.

Hair protein (hydrolyzed keratin)

This is a type of processed protein obtained by processing keratin-structured hairs. Since it is difficult to digest in its raw form, the degree of hydrolysis is considered critical in terms of actual bioavailability. It is not considered as a primary protein source on its own.

The percentage of protein in a food alone does not indicate quality. What matters is how much of that protein is actually digested and utilized. This is where bioavailability and digestibility come into play. Two foods showing the same percentage may have different effects on your dog's body due to different protein sources.

Animal by-products; Organ meats offer different vitamin and mineral values, collagen content, and calcium-phosphorus ratios compared to muscle meat. While organ meats concentrate specific micronutrients, bone and connective tissue carry more minerals and collagen. Therefore, when used in the right proportions, by-products become animal components that increase nutritional diversity.

As stated in the VCA Animal Hospitals source, the nutritional value of foods containing by-products depends on the quality of the parts used and the balance of the formulation.

By-product, Meat and Meat Meal

When you see “meat”, “meat meal” and “by-product” on the label, you are actually encountering three different structures. By-products refer to usable animal parts other than muscle and can be rich in micronutrients and collagen.

Fresh meat has a higher moisture content, is predominantly muscle tissue, and offers a balanced essential amino acid profile. Meat meal, on the other hand, is a dried and concentrated protein source, so the protein percentage is more stable. Therefore, the answer to the question “is by-product or meat better?” should be evaluated based on moisture content, nutrient density, and how the formula is structured from a canine nutrition science perspective.

Are Dog Foods Containing By-Products Healthy?

When you look at a dog food containing by-products, the first question that usually comes to mind is, "Are foods containing animal by-products healthy?"

Many dogs find the flavor of organ meats and offal quite appetizing. Therefore, formulas containing offal can provide an advantage in terms of taste for picky dogs. Of course, quantity and balance are still important here.

By-products also play a significant role from an economic point of view. Foods where muscle meat is the sole source can be more expensive due to production costs. When animal by-products are used, the nutritional value of the by-products is preserved while the cost is somewhat reduced.

On the sustainability side, the "nose-to-tail" approach comes to the fore. Utilizing more parts of a slaughtered animal, instead of just using the muscle tissue, reduces waste in the food chain. The European Commission's information text emphasizes that the environmental burden can be reduced by safely processing and using animal by-products in the feed industry.

Points to Consider Regarding Animal By-Products

The most important issue is raw material consistency. By-products may come from different organs and tissues in different batches. This can create fluctuations in nutritional profile and digestibility.

The second point is processing quality. Prolonged processing at high temperatures can lead to damage to some amino acids and a decrease in bioavailability. VCA Animal Hospitals also states that the nutritional value of feeds containing by-products depends on the process control as well as the parts used.

Finally, some dogs may develop sensitivities to certain by-products. While formulas containing offal in dog food are suitable for many dogs, foods containing only one type of animal protein may be a safer option for animals with a history of allergies.

Warning: If the label only states "animal by-product" and does not specify the type/organ, it becomes difficult to interpret the quality. In such cases, particular attention should be paid to the manufacturer's supply transparency, analysis data, and digestibility statements.

Importance of Animal By-Products According to the Life Stage of Dogs

Since bone and muscle development is paramount in puppies, puppy foods are formulated accordingly. A balanced calcium-phosphorus ratio and high bioavailability are critical during this period. Clearly specified offal and bone-derived by-products can provide additional micronutrient support in the right formula.

The goal in adult dog nutrition is to maintain ideal weight and energy balance. A food containing by-products may be suitable for daily use if it provides sufficient protein and controlled fat levels. The main criteria here are the energy density appropriate to the target weight and practical feedback such as your dog's stool quality and coat condition.

For senior dogs, easily digestible, high-quality protein and joint-friendly components become important. By-products containing collagen and gelatin can provide an advantage in terms of connective tissue support. It is safer to choose from senior dog foods that do not have a very high calorie load and have been well-tested for digestibility.

In dogs with allergies or digestive sensitivities, tolerance to by-products may vary. In this case, foods containing a single animal protein and clearly specifying the type of by-product offer a more controlled option. When switching to a new product, it is important to start with small portions and closely monitor stool and skin condition.

Frequently Asked Questions

In this section of our content, you can find frequently asked questions about animal by-products in dog food formulas.

What are animal by-products?

They are animal parts that are used less as human food after slaughter, but can still be nutritious. Organ meats, some connective tissues, and certain structural parts fall into this group.

Which animal by-products are used in dog food?

Generally, organ meats such as liver, spleen, kidney, and tripe, as well as parts containing lungs, trachea, cartilage, and limited amounts of skin and bone are used. Which by-products are included is more clearly understood through the description and manufacturer's explanations on the label.

Are by-products harmful to dogs?

The term "by-product" alone does not mean harmful. The problem is more related to unclear species information, poor process control, or the dog's individual sensitivity. Therefore, it is necessary to consult a veterinarian for the most accurate answer.

Is organ meat beneficial for dogs?

When used in controlled amounts, organ meats can provide intense vitamin and mineral support. Excessive use can lead to undesirable results, especially due to excess vitamin A from liver.

What should be considered when choosing dog food?

When choosing dog food, you should look at the first items on the label, the clarity of the species information, the phrase "complete and balanced," and the analytical components. You should also definitely take into account your dog's age, activity level, and possible sensitivities when making your choice.

Kaynaklar:

https://food.ec.europa.eu/food-safety/animal-products_en

https://www.aafco.org/consumers/understanding-pet-food/byproducts/

https://sites.tufts.edu/petfoodology/2016/05/31/dont-be-bothered-by-by-products/

https://ecommons.cornell.edu/items/c808afe2-7652-486b-af2e-36ccea979bb6

https://vcahospitals.com/know-your-pet/nutritional-benefits-of-by-products