Feed-Grade Is Not a Label You Add at the End: Three Evidence Questions for On-Farm Milk Recovery

The phrase feed-grade can make a difficult piece of work sound settled. It is not. Turning a liquid stream into a dry powder may change its handling characteristics, but it does not by itself establish what the product is, what it is suitable for, how it should be made or what can properly be said about it.

For on-farm milk recovery, that distinction matters. DairyTech is developing AXIS as a prototype under validation, with the aim of examining whether suitable, separated milk streams can be processed into a stable animal feed-grade powder. That work sits alongside, not ahead of, the evidence and regulatory questions that a future product pathway would require. This article is general information, not a substitute for advice from MPI, a dairy company, farm dairy assessor, veterinarian, food-safety specialist or health-and-safety adviser.

Question one: what is the product intended to do?

MPI classes animal feed, pet food and nutritional supplements as oral nutritional compounds. These are agricultural compounds under the Agricultural Compounds and Veterinary Medicines Act 1997. The definition matters because the intended nutritional role and the claims made about a product can affect its regulatory position.^[1]

A practical starting point is to describe only the intended nutritional role, without making promises about treating, preventing or managing an animal condition. MPI explains that products can fall outside the ordinary oral nutritional compound setting where therapeutic or pharmacological claims are made.^[1] That is why the words used around a potential feed product need to follow the evidence, not run ahead of it.

Question two: can the source and process be fully accounted for?

For any possible recovery pathway, the starting milk stream still matters. Its treatment history, reason for diversion, handling route and intended use do not disappear when it is moved or dried. A process needs a credible account of what entered it, how it was kept separate from the primary supply, what happened during handling and what was recorded along the way.

MPI's manufacturing guidance says that animal-feed manufacturers and millers must make sure a product is fit for purpose, operate a documented manufacturing system, follow that system and keep adequate records. It also sets requirements around specified label information and misleading statements.^[2] For a development programme, those points are useful design questions. What records will be needed? Which process steps need to be clear to a future operator, assessor or customer? What needs to be tested before any conclusion is drawn?

This is not an argument for making a trial more bureaucratic than it needs to be. It is an argument for collecting the right evidence early. Clear records can show the difference between a repeatable process and a one-off result achieved under favourable conditions.

Question three: would the future product information stand up on its own?

Labels and public statements are part of the product, not a final marketing exercise. MPI's guidance for animal feed says specified label information includes directions for use, an expiry or use-by date, and relevant precautions. It also says that advertising for oral nutritional compounds must not make therapeutic or pharmacological claims.^[3]

That gives a useful discipline during development. If the available validation does not yet support a statement, it should not appear in promotional copy, a brochure or a proposed label. A cautious description of the development work is more useful than certainty that will later need to be withdrawn.

Exempt from registration does not mean outside the rules

MPI notes that oral nutritional compounds may commonly be exempt from registration, including some animal feed products. The exemption is conditional. It does not remove the need to meet applicable requirements under the ACVM Regulations.^[4] Where animal material is involved, MPI also notes that requirements under the Animal Products Act 1999 may be relevant, depending on the activity and product.^[2]

The point is not to predict the final regulatory pathway from a distance. It is to keep the development work honest. A future product pathway needs to be assessed against the actual composition, intended use, manufacturing controls and claims, rather than assumed from the fact that a material is dry or potentially useful.

Where a class determination can help

MPI describes a class determination as advice on a product's status under the ACVM Act. It can be used to help determine whether a trade name product needs registration or fits an exemption category.^[5] For a venture working through product definition, that is a useful formal question to identify at the right time. It is not a substitute for the development evidence itself, and it is not something that can be inferred from a prototype run.

What this means for AXIS

AXIS is a DairyTech prototype under validation. The immediate task is to learn whether a portable, scalable and cost-effective drying system can manage suitable, separated milk streams in a way that fits real farm operations and supports a credible future evidence base. It is not a claim that every diverted stream is appropriate, that a powder is automatically fit for purpose, or that a regulatory pathway has been completed.

That boundary protects the farmer as much as the technology developer. It keeps primary supply, animal health, environmental responsibilities and product claims in view while the engineering and validation work continues. For DairyTech, the disciplined path is the one that can eventually support a useful on-farm solution to milk waste without creating a new uncertainty downstream.

If you are a farmer, processor, adviser or potential partner interested in this validation work, start with the practical facts: the type of separated stream, the current handling pathway and the operating question that needs an answer. DairyTech can then discuss whether there is a responsible next conversation, subject to the relevant professional and regulatory input.