One sentence, verbatim
On this page10
The statement
Material containing prohibited mammalian protein is labeled "Do not feed to cattle or other ruminants".
What is prohibited
Protein derived from mammalian tissues, in ruminant feed. The prohibition is about what a ruminant may be fed, which is why a product that is not for ruminants still has to say so when it contains the material.
The exceptions are specific
Blood products, gelatin, tallow, milk products, and porcine or equine protein among them. These are named exclusions rather than a general tolerance, and a formula sits inside or outside them.
Why the rule exists
Bovine spongiform encephalopathy. The transmission route that mattered was ruminant protein fed back to ruminants, and the regulation closes it by prohibiting the input rather than by testing the output.
Which is why it reaches your equipment
A prohibition on an input is only as good as the separation between products. The rule says so directly, and the next page is about what that means in a plant.
The label is the easy part
Printing one sentence correctly costs nothing. The written procedures, the clean-out and the year of records are the obligation, and they are not visible on the package.
Say it on the label even when it feels redundant
A poultry supplement containing prohibited protein carries the statement even though nobody intends to feed it to cattle. The rule is about what could happen on a mixed farm, not about what you intend.
Print it, do not paraphrase it
The same discipline as every quoted statement in this library. "Not for cattle" is shorter, reads better and is not the sentence the regulation specifies.
And make it findable on the label
The regulation is about the statement being there. A buyer on a mixed farm reading it is the point of the rule, so burying it in small print at the base of a back panel satisfies the letter and defeats the purpose.