1stly it'll need to fit down a rat hole, make sure there is no possibility of the tunnels intersecting drainage pipes, lost ferret, also always use a locator, micro or Mk3 would be best due to the confined spaces
And use an older ferret, take a first aid kit for your ferrets with you
Thats covered it i think :thumbs:
Thanks for reply longdog , sounds like you have experience using them on rats. Can i ask you do ferrets pack in with rats after a while or will they work rats season after season, cheers again.