---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchE"
level: "subchap"
label: "Subchapter E"
heading: "Animal Drugs, Feeds, and Related Products"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchE"
sections_count: 1411
---

# Subchapter E — Animal Drugs, Feeds, and Related Products

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services

## Contents

- [Part 500 — General](/cfr/21/chI-subchE-part500.md)
- [Part 501 — Animal Food Labeling](/cfr/21/chI-subchE-part501.md)
- [Part 502 — Common or Usual Names for Nonstandardized Animal Foods](/cfr/21/chI-subchE-part502.md)
- [Part 507 — Current Good Manufacturing Practice, Hazard Analysis, and Risk-Based Preventive Controls for Food for Animals](/cfr/21/chI-subchE-part507.md)
- [Part 509 — Unavoidable Contaminants in Animal Food and Food-Packaging Material](/cfr/21/chI-subchE-part509.md)
- [Part 510 — New Animal Drugs](/cfr/21/chI-subchE-part510.md)
- [Part 511 — New Animal Drugs for Investigational Use](/cfr/21/chI-subchE-part511.md)
- [Part 514 — New Animal Drug Applications](/cfr/21/chI-subchE-part514.md)
- [Part 515 — Medicated Feed Mill License](/cfr/21/chI-subchE-part515.md)
- [Part 516 — New Animal Drugs for Minor Use and Minor Species](/cfr/21/chI-subchE-part516.md)
- [Part 520 — Oral Dosage Form New Animal Drugs](/cfr/21/chI-subchE-part520.md)
- [Part 522 — Implantation or Injectable Dosage Form New Animal Drugs](/cfr/21/chI-subchE-part522.md)
- [Part 524 — Ophthalmic and Topical Dosage Form New Animal Drugs](/cfr/21/chI-subchE-part524.md)
- [Part 526 — Intramammary Dosage Form New Animal Drugs](/cfr/21/chI-subchE-part526.md)
- [Part 528 — Intentional Genomic Alterations in Animals](/cfr/21/chI-subchE-part528.md)
- [Part 529 — Certain Other Dosage Form New Animal Drugs](/cfr/21/chI-subchE-part529.md)
- [Part 530 — Extralabel Drug Use in Animals](/cfr/21/chI-subchE-part530.md)
- [Part 556 — Tolerances for Residues of New Animal Drugs in Food](/cfr/21/chI-subchE-part556.md)
- [Part 558 — New Animal Drugs for Use in Animal Feeds](/cfr/21/chI-subchE-part558.md)
- [Part 564 — Part 564 [reserved]](/cfr/21/chI-subchE-part564.md)
- [Part 570 — Food Additives](/cfr/21/chI-subchE-part570.md)
- [Part 571 — Food Additive Petitions](/cfr/21/chI-subchE-part571.md)
- [Part 573 — Food Additives Permitted in Feed and Drinking Water of Animals](/cfr/21/chI-subchE-part573.md)
- [Part 579 — Irradiation in the Production, Processing, and Handling of Animal Feed and Pet Food](/cfr/21/chI-subchE-part579.md)
- [Part 582 — Substances Generally Recognized as Safe](/cfr/21/chI-subchE-part582.md)
- [Part 584 — Food Substances Affirmed as Generally Recognized as Safe in Feed and Drinking Water of Animals](/cfr/21/chI-subchE-part584.md)
- [Part 589 — Substances Prohibited from Use in Animal Food or Feed](/cfr/21/chI-subchE-part589.md)
- [Part 590-599 — Parts 590-599 [reserved]](/cfr/21/chI-subchE-part590-599.md)