# New Animal Drugs for Use in Animal Feeds; Monensin
> **Food and Drug Administration** · Final rule; technical amendment. · Published 2012-09-19 · Effective 2012-09-19 · 77 FR 58021
## Document
- **Document number:** 2012-23065
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 77 FR 58021
- **CFR reference:** 21 CFR 520
- **Publication date:** 2012-09-19
- **Effective date:** 2012-09-19
- **HHS docket:** Docket No. FDA-2012-N-0002
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to remove a warning for growing cattle on pasture or in dry lot and to codify all monensin free-choice Type C medicated feeds in 21 CFR part 558. This action is being taken to improve the accuracy of the regulations.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/09/19/2012-23065/new-animal-drugs-for-use-in-animal-feeds-monensin)
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