How to compare poultry meal specifications and lot analysis

Start with ingredient identity and source description

Before comparing numbers, make sure each offer describes the same ingredient. “Poultry meal” can be used as a broad product name, but the declared ingredient identity and description of the source material provide important context. Ask what the product is called in the supplier’s specification and how its source materials are described. Do not assume that similarly named meals have identical compositions.

This first check matters because a nutrient figure has meaning only in relation to the material it describes. If two offers use different identity descriptions or source-material wording, treat them as distinct until the difference is clear. Compare the specification with the lot analysis so you know whether the analysis applies to the same product description and shipment being quoted.

Compare protein, fat and ash together

Crude protein is a central comparison field, but it does not describe the entire nutritional profile. Review it alongside fat and ash: fat contributes energy, while ash represents the material’s total mineral residue. A higher protein figure alone does not establish that one lot is a better fit if fat, ash or other constraints also affect the formulation.

These values are most useful when the offers report them on the same basis. Check whether figures are reported as received (as-fed) or on a dry-matter basis. Moisture changes the proportion of nutrients in a given weight of material, so figures on different bases cannot be compared directly without adjustment. If the basis is missing or unclear, request clarification rather than treating the displayed percentages as equivalent.

Read moisture and mineral values in context

Moisture helps explain the as-fed concentration of the other reported components and is also relevant to receiving and storage decisions. Compare moisture alongside the analytical basis, not as an isolated number. For formulation work, a moisture difference can change the amount of dry nutrients delivered in a given shipment weight.

Calcium and phosphorus merit separate attention because they identify important mineral contributions that crude protein and total ash do not. Compare both values when the ration or finished-feed specification depends on mineral balance. Confirm how each is expressed and whether the analysis gives total values; do not infer availability or nutritional equivalence from calcium and phosphorus totals alone.

When to request amino-acid or digestibility detail

Amino-acid information becomes more useful when the formulation depends on particular amino acids rather than crude protein alone. Ask for the specific amino-acid values your nutritionist needs and check that the supplier’s analysis actually reports them. A protein percentage cannot substitute for an amino-acid profile.

Digestibility information can help evaluate how much of a nutrient may be available for use, but the result depends on the reported measure and test method. Treat digestibility figures as comparable only when their definitions and methods are clear and sufficiently alike for your purpose. If your formulation does not use these measures, they may add complexity without resolving the main comparison.

Use the lot analysis to compare the shipment offered

A product specification describes the stated product requirements or characteristics; a lot analysis reports results for a particular lot. For a bulk purchase, read both. Check that the analysis identifies the lot being offered, includes the fields important to your formulation, and uses the same units and analytical basis as the specification.

Build a side-by-side comparison with ingredient identity, source-material description, protein, fat, ash, moisture, calcium, phosphorus and the reporting basis. Add amino-acid or digestibility fields when they affect the application. Values must come from the actual specification and lot analysis, not from assumed reference figures: no single set of figures should be treated as a market guarantee for poultry meal. Once you have defined the analysis you need, visit the [Poultry Meal page](/ingredients/poultry-meal) to explore sourcing.

Common questions.