People's Trust for Endangered Species coordinates dormouse reintroduction programmes that restore populations to historic habitats, requiring careful attention to individual animal welfare during the process.
Reintroduction welfare for dormice centres on the stress of capture, health assessment, transport, and release into unfamiliar habitat. Procedures are designed to be minimally invasive and rapid. The weight requirements for release — animals must be above threshold weight to have adequate fat reserves for their first hibernation — protect individual animals from being released into conditions they cannot survive. Post-release monitoring through nest boxes is the primary welfare check, detecting individuals that fail to establish territories or lose weight. The substantial habitat preparation required before release — creating the woodland structure dormice need — is itself a welfare investment that maximises each reintroduced individual's chance of successful establishment.