Medicated feed is poultry feed carrying an approved drug — most commonly coccidiostats for disease prevention, or antibiotics for treatment under veterinary direction — and its defining discipline is the withdrawal period: the legally mandated interval between the last medicated feed and slaughter, during which the drug must clear the bird's system. Birds slaughtered within the withdrawal window cannot ship; a missed withdrawal date is the most expensive record gap a poultry operation can have, because it puts the entire flock's eligibility at risk. This page covers what medicated feed is used for, why the withdrawal record matters more than the medication itself, and how the record discipline works in practice.
What Medicated Feed Does
| Use | What It Is | Record Implication |
|---|---|---|
| Coccidiosis prevention | Coccidiostats — ionophores and synthetic compounds — suppress coccidia development; standard in broiler programs (the coccidiosis guide covers the disease) | Program-level record: product, batch, phase, dates — the coccidiosis program is part of the flock's health record |
| Disease treatment | Antibiotics prescribed for diagnosed conditions — a veterinary decision, never a grower's default | Individual-flock record: product, batch, dose, start date, withdrawal end date — the withdrawal record is the compliance artifact |
| Coccidiosis control in replacement birds | Vaccination and controlled-exposure programs that may include medicated feed — a breeder and pullet-rearing concern | Program records that carry forward to the laying flock's history |
Why The Withdrawal Record Matters More Than The Medication
- Withdrawal periods are legally enforceable. The interval is set by the product label and regulation — there is no judgment call at the dock. A bird within the window is a bird that cannot ship, and the plant's residue testing is the enforcement.
- The record is what proves compliance. Product, batch number, dose, start date, last-administered date, and calculated withdrawal end date — the complete record set is what an auditor or integrator reads when confirming the flock is clear. The integrator records standard covers the required fields; the audit-ready guide covers how the record set walks into a review.
- Multiple medications compound the question. If a flock received two medicated feeds or a medication plus a water treatment, the governing withdrawal is the longest one — the record discipline handles this automatically when every treatment is logged with its own dates.
- Medicated feed and organic certification conflict. The organic feed guide covers why organic programs exclude most medicated feed — the certification rules and the withdrawal rules are different systems that both bind the flock.
The Record Discipline In Practice
The operational habit: log every medicated feed delivery with product, batch, phase, and dates the moment it arrives; log the last-administered date when the phase ends; calculate and record the withdrawal end date; and check the withdrawal end date against the planned catch date before the flock goes on the catch list. That last check is the whole discipline — it is what turns a compliance requirement into a scheduling rule instead of a discovery at the dock. The feed budget guide covers the feed-delivery logging that the medication record rides on; the catch chart guide covers the scheduling side the withdrawal date constrains.
Tracking Medication Records In Poultry Log™
Medication records in Poultry Log™ carry product, batch, dose, dates, and withdrawal end date as structured fields — the record set auditors read most carefully — alongside the feed deliveries and health observations that provide the flock's context. When the integrator or veterinarian asks what was given, when, and with what batch, the timeline answers in minutes.
- 2026-10-06: Comprehensive rewrite — use table, withdrawal-record discipline section, and scheduling-rule framing — replacing the earlier boilerplate version.
- Earlier version: short first-person note on medicated feed.