pet food science podcast Oct 26, 2023

Inspired by Episode 10 of The Pet Food Science Podcast Show with Dr. Kelly Swanson

In the dynamic world of pet food formulation, a component that continues to gain immense significance - is dietary fiber. The expansive landscape of animal nutrition has always recognized the pivotal role of dietary fiber. But with evolving definitions, diverse sources, and enhanced analytical techniques, dietary fiber's position in pet food is increasingly getting magnified.


A Revised Understanding of Dietary Fiber

Historically, the interpretation of fiber predominantly included non-digestible carbohydrates from plant sources. However, as industries evolve, so does their understanding. A pivotal moment in this evolution came in 2016 when the Food and Drug Administration (FDA) enhanced this definition. No longer was fiber confined to plant-derived sources. Now, synthetic non-digestible carbohydrates also found their rightful place under the fiber umbrella, provided they delivered physiological benefits. This adjustment opened doors to many sources, such as innovative proteins derived from insect meals.


The Analytical Prowess Behind Fiber Estimation

Accurately gauging fiber's contribution to pet food is a challenging endeavor. Conventional techniques, such as the crude fiber method, have been utilized for over a century. Yet, their limited capability to accurately estimate soluble fiber concentrations demanded an upgrade. Enter the total dietary fiber (TDF) method. This state-of-the-art approach promises a holistic representation of dietary fiber's presence in pet food. But, as with any innovative method, it presents challenges, such as variable assessments based on the food's format and a costlier implementation than its predecessor.

With anticipated mandates to include TDF on pet food labels in the coming years, the onus is on pet food companies to consolidate their understanding and data on fiber content. Such proactive measures ensure seamless alignment with shifting regulations and uplift their product's health profile.


The Expanded Influence of Dietary Fiber

The power of dietary fiber extends beyond canines and felines. Its repercussions resonate among a broader group of monogastric animals - rabbits, horses, and crucially, commercially raised beings like poultry and swine.

In commercial livestock, poultry doesn't naturally seek high-fiber diets. However, swine's nutritional demands vary drastically depending on gestation and growth phases. Here, dietary fiber emerges as a powerful ally, preventing undue weight gain in pregnant sows and influencing a growing pig's nutritional intake.

Groundbreaking studies in this sector have shifted from the now outdated crude fiber measurement to more advanced methods. Yet, while these techniques significantly represent fiber content in livestock feed, there remains a void regarding soluble fibers, a gap aptly bridged by the TDF method.

Recent explorations delve into the potential of fiber-degrading enzymes in poultry and swine diets. The promise? Enhanced digestion of fibers, accelerated growth rates, and reduced feed wastage.


Comparative Nutrition - A Deep Dive

Animal nutrition is a vast and complex field. Each species, with its unique gastrointestinal architecture, may respond differently to identical dietary intakes. Delving into the enzymes and transporters specific to each species' digestive tract can uncover these distinct responses.

Interestingly, findings from human dietary studies seem more compatible with pets, such as dogs and cats, than rodent models. This compatibility underscores the fascinating similarity between human and pet reactions to fiber-rich or deficient diets.


Fiber through the Life Cycle

Dietary fiber's influence isn't static; it varies throughout an animal's life. In infancy, the balance is delicate, ensuring growing animals receive the energy they need. Adulthood sees fiber actively in maintaining weight, blood glucose, and lipid levels. When pets transition to their senior years, dietary fiber's role gets accentuated, stimulating overall health, provided its intake is optimized to avoid digestive disturbances.

Furthermore, dietary fiber significantly affects stool quality, which is often a primary concern among pet owners. The balance between soluble and insoluble fiber types becomes paramount here, directly influencing stool consistency.


The Necessity of Trustworthy Information Sources

In today's digital age, with a deluge of data at one's fingertips, the accuracy and reliability of sources become paramount. For those vested in animal nutrition research, platforms like PubMed offer a treasure trove of systematic reviews and research studies. However, one must navigate this sea of information with discernment, especially when moving beyond peer-reviewed journals.


Academic Collaborations – A Path Forward

The narrative surrounding dietary fiber is growing, emphasizing the need for unbiased, academic viewpoints. Academia stands poised and eager to collaborate with the pet food industry, bringing a logical, impartial lens to study animal nutrition and dietary fiber. But to make this collaboration fruitful, academic institutions need adequate support, emphasizing the critical role of funding.



The journey of dietary fiber in pet food formulation is an evolving one. With revamped definitions, advanced analytical methods, and a deeper understanding of its broad impact, dietary fiber has cemented its position in animal nutrition. Collaborative endeavors, continual exploration, and a commitment to understanding will ensure that the pet food industry remains at the forefront of nutrition-based innovation.



Fiber Analysis Revolution: A New Era in Pet Food Labeling, by Dr. Kelly Swanson. Pet food science podcast, 2023. Available at: <>. Access on October 20th, 2023.