Water buffalo meal in pet food: Classification of a collagen- and mineral-rich raw material

Water buffalo meal is frequently used in pet food as an alternative animal protein source.

It has been categorized. However, a closer look at its composition, analysis, and amino acid profile reveals that this classification falls short. Its properties clearly distinguish it from conventional meat meal and determine how it can be used effectively.

Origin and species classification

Water buffalo (Bubalus arnee or, in its domesticated form, Bubalus bubalis) belong to the bovid family but are not identical to domestic cattle (Bos taurus). Despite similar uses, the two species differ in origin, husbandry, and raw material sources.

The water buffalo meal used comes from India, where water buffaloes are traditionally used in agriculture and are available year-round. Continuous slaughter ensures consistent raw material quality without pronounced seasonal fluctuations.

For formulation practice, a clear distinction from beef is relevant, especially in the context of monoprotein concepts and in the development of alternative animal protein sources.

Raw material base and processing

The water buffalo meal offered by animalPro nutrition GmbH is produced in a specialized slaughterhouse that processes only water buffalo. This eliminates any mixing with other animal protein sources during the manufacturing process and ensures clear single-protein content.

Possible cross-contamination can only occur in trace amounts during handling.

The primary starting material is bone, and to a lesser extent, bone.

Meat trimmings and offal. This composition significantly shapes the raw material and explains the high mineral content as well as the collagen-dominated amino acid profile.

The processing is carried out by pressure sterilization according to Method 1 of Regulation (EU) 1069/2009 at 133 °C, 3 bar and 20 minutes. This procedure ensures a high level of microbiological safety and consistent product quality.

Analysis - High mineral content as a defining characteristic

The analysis reveals a picture typical for raw materials containing bone:

• Crude protein approximately 48–52%

• Crude fat approximately 6–9%

• Crude ash approximately 32–36%

• Calcium approximately 12–14%

• Phosphorus approximately 5–7%

The fluctuations are in the range of approximately ±3% in absolute terms and are due to raw material variations. The calcium-to-phosphorus ratio remains stable at approximately 2:1.

The high crude ash content clearly distinguishes water buffalo meal from conventional meat meals. While the latter primarily serve as a protein source, water buffalo meal simultaneously introduces significant amounts of minerals into the diet.

Amino acids - Why look beyond the crude protein content

The crude protein content alone says little about how nutritionally efficient a protein is. What matters are the amino acids it contains, the building blocks of the protein.

For feeding, this means: dogs and cats need certain essential nutrients.

Sufficient amounts of amino acids are necessary. If individual building blocks are missing or only present in low concentrations, the protein as a whole cannot be utilized as effectively, even if the crude protein content is high.

The amino acid composition is therefore crucial for product development. It determines whether a raw material is suitable for meeting the demand or whether it needs to be specifically supplemented.

The amino acid profile presented here provides a clear insight:

• Glycine approximately 8–9%

• Proline approximately 4–5%

• Glutamic acid approximately 5–6%

• Lysine approximately 2%

• Methionine approximately 0.5–0.6%

• Cysteine approximately 0.6–0.7%

• Tryptophan approximately 0.15–0.2%

The high levels of glycine and proline are typical for collagen-rich tissues and reflect the proportion of bone and connective tissue.

At the same time, comparatively low levels of essential amino acids, especially methionine and tryptophan, are shown. These amino acids are essential for dogs and cats and must be adequately supplied through their diet.

This classification is particularly relevant for cats. They have a significantly higher requirement for sulfur-containing amino acids and are more dependent on a continuous supply. Raw materials with a collagen-dominated amino acid profile contribute only to a limited extent to this and must be supplemented accordingly.

In practical terms, this means that water buffalo meal provides protein, but only contributes to a limited extent to the supply of essential amino acids and should be specifically combined with other protein sources in the recipe.

This makes it clear: The crude protein content alone does not adequately describe the nutritional quality of a raw material.

This amino acid profile is also reflected in the biological value and digestibility of the protein.

Protein quality and digestibility

Due to the raw material composition, the protein quality is lower than that of

muscle meat-based protein sources.

Bone and collagen-rich components contain fewer essential amino acids and exhibit lower digestibility. Literature data on meat and bone meal show correspondingly reduced values for apparent protein digestibility and a lower proportion of digestible crude protein.

Additionally, thermal treatment during pressure sterilization can...

further influence protein availability.

In practical terms, this means that water buffalo meal provides protein, but is not a primary raw material for meeting amino acid requirements.

The crucial limiting factor: calcium and phosphorus

The mineral content largely determines the application limits.

With calcium contents of approximately 12–14%, even a moderate amount leads to significant calcium inputs into the ration. When using:

• 10% results in approximately 1.2% calcium in the final feed

• 15% approximately 1.8% calcium

• 20% approximately 2.4% calcium

This ensures that the recommended maximum levels of FEDIAF (2025) are reached quickly, especially in growing animals.

Therefore, in practice, its use is limited not by the protein content, but by calcium and phosphorus.

Quality and freshness

An often underestimated parameter is biogenic amines, which provide information about raw material quality and storage.

The analyses presented here show very low levels, for example:

– Histamine <10 mg/kg

– Putrescine <10 mg/kg

This suggests controlled raw material processing and good freshness.

Classification within the formulation

Water buffalo meal combines several functional properties in one raw material. It provides protein, simultaneously supplies relevant amounts of calcium and phosphorus, and contains collagen-rich structural components.

This combination makes the raw material particularly interesting for applications where, in addition to protein supply, mineral composition and structural properties are also to be taken into account.

In practice, water buffalo meal is therefore used in a targeted manner, for example:

• for combining a protein and calcium source in one ingredient

• to supplement collagen-rich ingredients in the formulation

• in monoprotein concepts with alternative animal raw materials

The prerequisite is a conscious integration into the overall formulation, especially with regard to amino acid profile and mineral content.

Conclusion

Water buffalo meal combines protein, minerals and collagen-rich structures in one

Raw material. It is precisely this combination that makes it interesting – and at the same time challenging to use.

Its use requires conscious formulation control, taking into account calcium, phosphorus and amino acid profile.

When used correctly, water buffalo meal offers a functional addition to the raw material portfolio. Without this classification, the raw material is often used incorrectly.