Badger vaccine trialled on Gloucestershire reserve
31 May 2013 Last updated at 10:55 BST
Vaccinating badgers against bovine tuberculosis - which opponents to the cull in England are advocating as an alternative - is being trialled by the Gloucestershire Wildlife Trust.
The badgers are humanely trapped, injected and marked with coloured paint to prevent the same animal being injected twice.
Pete Bradshaw from the trust showed the BBC's Jeremy Cooke how to vaccinate a wild badger.