Why collagen is re-emerging as a strategic pet food ingredient

For decades, starch served as the industry’s primary binder, essential for the structural integrity of extruded products. However, as manufacturers reduce carbohydrate loads to meet demand for high-protein and grain-free diets, maintaining product durability has become a complex formulation challenge. This is where collagen’s natural binding properties offer a significant processing advantage.

Processing performance

In extrusion, reducing starch often compromises kibble integrity. Research conducted at Kansas State University indicates that low-bloom collagen increased expansion while preserving the durability of the kibble. Collagen functions as an effective nutritional binder in high- protein pet foods, allowing formulators to lower reliance on starch without increasing breakage.

Collagen addition furthermore improves extrusion efficiency by lowering motor load, reducing required water, and enabling higher shaft and knife speeds with only minimal process adjustments. These improvements enhance dough flow, cohesion and cut quality, resulting in more consistent and stable kibble production.

Application across formats

Collagen’s formulation value extends across categories:

• Dry pet food: Collagen acts as a nutritional binder in extruded and cold-pressed kibbles, supporting hardness and durability while replacing starch.
• Snacks and treats: Texture is adjustable via bloom strength and inclusion levels. Lower bloom yields firmer textures; higher bloom creates softer, elastic chews.
• Wet pet food: Collagen supports loaf structure, heat stability and palatability, and supports meat replacement while maintaining product quality.

Health benefits

Collagen’s triple-helix structure provides strength and flexibility, making it essential for overall health. Consequently, hydrolyzed collagen (such as Hydro-P Premium) is increasingly used for its bio-functional properties, particularly in diets targeting joint health, mobility and recovery. Suitable for hypoallergenic diets and large breeds, it maintains healthy skin and coat while aiding tissue repair. Ongoing research continues to explore its role in managing osteoarthritis and reducing inflammation.

Conclusion

As pet food formulations move toward cleaner labels and lower starch levels, collagen is emerging as a strategic, multifunctional ingredient. It supports kibble structure and processing efficiency while boosting protein content and reducing reliance on traditional binders. At the same time, collagen aligns with sustainability goals through upcycled sourcing and delivers proven benefits for mobility, skin and coat health.

Curious how collagen can enhance your product’s texture or nutritional profile? Contact Darling Ingredients to learn more about integrating these solutions into your formulation strategy.