Managing Non-GM feed conversion periods for livestock and fish

What the requirement is, and why it exists

Under the GLOBALG.A.P. Non-GM Add-on Standard Module 2 Farm/Producer Version 1.1, producers must comply with mandatory minimum feeding times using Non-GM feed before livestock or aquaculture products qualify for Non-GM or Ohne Gentechnik labeling. Control Point NON-GM FARM 2.3 establishes that conversion periods defined in ANNEX 1 must be observed and documented across all production cycles. This requirement applies to Option 1 individual producers and Option 2 producer groups raising livestock or farmed aquatic species intended for Non-GM supply chains.

The rationale behind conversion periods is eliminating residual genetically modified feed materials from animal systems and establishing full supply chain integrity. Standard feeding regimes often utilize genetically modified soy or maize, which must be systematically replaced with verified Non-GM feed for specified durations prior to slaughter or milking. Enforcing strict conversion timelines ensures that consumers receive authentic Non-GM products backed by verifiable farm-level evidence.

Compliance leads, quality managers, and internal auditors must recognize that Control Point NON-GM FARM 2.3 is classified as a Major Must. Failure to meet the exact minimum conversion duration for any batch results in an immediate audit non-conformance, preventing the issuance of a letter of conformance. Management must maintain complete feeding logs, delivery notes, and movement records to demonstrate continuous compliance.

Species-specific conversion timelines and transition rules

ANNEX 1 sets binding conversion periods tailored to the physiological growth cycles and production characteristics of different livestock and aquaculture species. Producers must verify that animals receive compliant Non-GM feed for the entire minimum period prior to product dispatch. Control Point NON-GM FARM 2.3 mandates that farm procedures explicitly describe how these transition times are tracked and verified for every batch.

For livestock species, transition times vary significantly based on operational category. Beef cattle, including Bubalus and Bison subspecies, require a minimum conversion period of twelve months and at least three quarters of their lifetime on Non-GM feed. Small ruminants require six months, pigs require four months, milk producing animals require three months, and poultry acquired before day three after hatch require ten weeks. Fish from aquaculture require Non-GM feed for their entire lifetime, from hatching onwards to finished fish.

When producers purchase additional animals during an ongoing grow-out cycle, Control Point NON-GM FARM 2.3 allows factoring in the previous owner's Non-GM feeding period under strict conditions. The previous owner must supply a written confirmation stating the exact date from which the animals were verifiably fed Non-GM feed. Without this documented confirmation, the full conversion period restarts on the date the animals arrive at the receiving farm.

Operational procedures for feed handling and equipment flushing

Preventing cross-contamination during feed delivery, storage, and mixing is essential to maintaining conversion integrity. Control Point NON-GM FARM 5.3 mandates complete segregation of Non-GM feed from GM feed during receipt, storage, internal transport, and feeding. Simultaneous storage of GM and Non-GM feed on the same site is permitted only when permanent physical segregation prevents accidental mixing.

Control Point NON-GM FARM 5.4 strictly prohibits storing GM feed and feeding it to the same category of livestock or aquaculture species on the same production site as Non-GM production. When producers operate home-mixing or mobile grinding and mixing facilities under Control Point NON-GM FARM 5.5 and Control Point NON-GM FARM 5.6, specific equipment flushing protocols must be executed.

Equipment flushing must be executed systematically whenever shared facilities transition between GM and Non-GM feed production. To maintain audit compliance, operators of shared mixing equipment must follow a standardized three-step flushing and verification procedure:

• Clean mixing chambers, hoppers, and conveyers thoroughly to remove residual GM feed dust and particles.
• Run a documented flushing batch using Non-GM physical material prior to processing Non-GM feed rations.
• Archive flushing logs and conduct an annual GMO analysis on finished feed samples through an ISO 17025 accredited laboratory.

Example

During an annual audit of a cattle fattening farm, the auditor reviewed batch records for thirty head of beef cattle acquired six months prior to slaughter. The farm owner presented feed purchase invoices showing Non-GM compound feed use since arrival but lacked written confirmation from the calf breeder regarding previous Non-GM feeding. Because beef cattle require twelve months and three quarters of their lifetime on Non-GM feed under Control Point NON-GM FARM 2.3, the auditor issued a Major Must non-conformance.

To resolve the non-conformance, the quality manager contacted the calf breeder and obtained a signed declaration verifying Non-GM feeding dates from birth. The quality manager submitted the declaration alongside updated batch conversion tracking sheets to the certification body, enabling the lifting of the non-conformance.

Before your audit

• Confirm that facility descriptions under Control Point NON-GM FARM 1.1 identify all potential GM feed intake points.
• Review batch movement logs to verify that all livestock meet minimum ANNEX 1 conversion periods prior to dispatch.
• Secure written Non-GM feeding declarations from previous owners for any animals purchased during the grow-out cycle.
• Inspect incoming feed delivery notes under Control Point NON-GM FARM 5.2 to ensure explicit Non-GM status statements.
• Check that mobile and stationary feed mixing equipment flushing batches are documented in daily operational logs.
• Verify that annual finished feed GMO laboratory analyses are conducted by an ISO 17025 accredited testing facility.
• Ensure all Non-GM production documentation, delivery bills, and invoices are archived for at least five years under Control Point NON-GM FARM 4.1.
• Complete and archive an annual internal self-assessment against Module 2 before the external certification body audit.

Questions people ask

What is the Non-GM feed conversion period for aquaculture species?

Under ANNEX 1 of the GLOBALG.A.P. Non-GM Add-on Standard Module 2, fish from aquaculture must receive Non-GM feed for their entire lifetime, from hatching onwards to finished fish. There is no shortened transition period permitted for aquatic species.

How long must milk producing animals receive Non-GM feed before milk is certified?

ANNEX 1 mandates a minimum conversion period of three months of continuous Non-GM feeding for milk producing animals. Milk collected prior to completing this three-month window cannot be labeled as suitable for Non-GM production.

Can previous feeding history be counted toward livestock conversion times?

Yes, Control Point NON-GM FARM 2.3 permits factoring in previous feeding history if the producer holds a written confirmation from the previous owner. The document must state the exact date from which the animals were verifiably fed Non-GM feed.

How long must Non-GM feed delivery notes and compliance records be kept?

Control Point NON-GM FARM 4.1 requires producers to retain all documentation related to Non-GM labeling and feeding for at least five years. These records must be available for inspection during annual certification body audits.

Reference documents

• GLOBALG.A.P. Non-GM Add-on Standard Module 2: Farm/Producer, v1.1_Jan20, Section NON-GM FARM 1, Section NON-GM FARM 2, Section NON-GM FARM 4, Section NON-GM FARM 5, ANNEX 1
• GLOBALG.A.P. Integrated Farm Assurance Smart/GFS - principles and criteria for aquaculture, v6.0_Mar23, Section AQ 22