Nearly all the attention on the FDA's newly proposed food ingredient rule has focused on what is in packaged human food. The proposal has a second half that almost no one is discussing, and it governs what goes into dog food, cat food, and the feed eaten by cattle, pigs, and chickens.
The proposed rule was announced by HHS on August 10, 2026, and published in the Federal Register the following day under docket number FDA-2025-N-3262. It would amend two parts of federal regulation: Part 170, which covers substances added to human food, and Part 570, which covers substances added to animal food. Comments are due December 9, 2026.
