Episode
Ep 47 | David Petrie-Dolphin: How Poultry Vaccines and Animal Health Products Get Approved
- Podcast
- The Poultry Network Podcast
- Published
- Jun 26, 2026
- Duration seconds
- 1462
- Processing state
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Summary
In this episode of the Poultry Network Podcast, Tom Woolman speaks with David Petrie-Dolphin of Drayton Animal Health about the behind-the-scenes work involved in bringing poultry vaccines, veterinary medicines and animal health products to market. David explains the role of a Contract Research Organisation, or CRO, and why pharmaceutical and animal health companies often use specialist external facilities to carry out regulated safety and efficacy studies. The conversation covers how studies move from early molecule testing through to animal safety work, controlled trials and real-world farm testing. They also discuss the strict regulatory environment around animal health research, including Home Office licensing, third-party auditing, GLP and GCPv standards, and the role of bodies such as the European Medicines Agency and the Veterinary Medicines Directorate. A key theme throughout the episode is animal welfare, with David explaining how welfare, ethics, acclimatisation, study design and the three Rs — replacement, reduction and refinement — shape every trial. Key topics covered What a CRO does David explains that Drayton Animal Health is a Contract Research Organisation carrying out animal safety and research work for veterinary medicines, vaccines, feed additives and related products. Why pharmaceutical companies use CROs Rather than building and maintaining specialist facilities that may only be needed every few years, companies can work with CROs that run regulated studies day in, day out. What the research environment looks like The facilities are described as secure and highly controlled, but still farm-like in appearance and operation, reflecting the practical realities of livestock production. How vaccine and medicine approval works David outlines the multi-s…