Meat and bone meal in swine diets: balancing protein and minerals

What meat and bone meal contributes

Meat and bone meal (MBM) can supply protein alongside calcium and phosphorus in swine diets. Its combination of nutrients makes it different from a protein ingredient that contributes little mineral: adding MBM affects both the protein calculation and the ration’s mineral balance.

The exact contribution is not fixed across all MBM. Raw material and processing influence its nutrient composition, so a formulation needs analysis for the specific ingredient being considered. A product’s crude protein value alone cannot describe its calcium, phosphorus or usable amino-acid contribution.

Balance bone-derived minerals in the whole ration

Bone contributes much of MBM’s mineral content. That can help meet a ration’s mineral needs, but it also means calcium and phosphorus supplied by MBM must be counted alongside minerals from other ingredients and supplements. Adding an ingredient to address protein without accounting for those minerals can disrupt the intended balance.

The relevant question is not simply how much total phosphorus is present. A swine nutritionist must formulate against the applicable phosphorus requirement and the values used by the feeding program, including the assumed availability or digestibility of phosphorus. Calcium must be evaluated in relation to that phosphorus and to the complete diet. The right calculation depends on the animal group and the rest of the ration; no single inclusion rate fits every formulation.

Evaluate protein beyond the crude protein figure

Protein analysis is useful for comparing ingredients, but it does not show how much of each amino acid the pig can use. Amino-acid composition and digestibility matter because a diet must supply the required amino acids, not merely reach a crude-protein target. MBM’s amino-acid contribution should therefore be assessed using values appropriate to the actual product and formulation system.

Ask the nutritionist which amino-acid values are needed for the intended pigs and whether the ingredient information supports those values. Processing can affect protein quality, so assumptions from a generic table may not represent a particular lot. If amino-acid digestibility data are unavailable, the nutritionist can decide whether the available analysis is sufficient for the intended use or whether another ingredient or formulation approach is preferable.

Start with the animal group and the complete diet

Requirements differ among swine groups and production stages. A formulation for young pigs, growing pigs, finishing pigs or breeding animals should be assessed against the relevant animals, rather than transferring a rate from a different diet or production context. The current formula matters too: other protein ingredients, mineral sources and the balance of the ration all affect how MBM fits.

Before adopting a formulation, give the nutritionist the intended animal group, the full ingredient list and the actual MBM analysis. Ask which requirements are driving the decision, how calcium and phosphorus will be balanced, and which amino-acid availability values will be used. Any formulation guidance should be checked for the specific pigs and ingredients; neither a generalized rate nor a protein percentage answers those questions on its own.

Turn the formulation decision into a sourcing specification

Once the nutritionist defines the needed nutrient profile, use it to describe the MBM being sourced. Identify the required product and form, quantity, destination and receiving setup, then state which analyses matter to the formula. Calcium, phosphorus and protein are central to the questions discussed here; amino-acid data may also be relevant where the formulation depends on them. The requested information should match the nutritionist’s calculation method.

For a bulk purchase, align the quality information used to formulate the diet with the product being quoted. Ask how the analysis relates to the offered lot and what documentation is available for the specific order. Exact composition and commercial terms depend on the supplier offer. When the formulation requirements are clear, the [meat and bone meal page](/ingredients/meat-and-bone-meal) is the next step for sourcing discussions.

Common questions.