I just put them right in the run and caught something the first or second night. The smaller rats, even if they trigger it, can escape through the holes, but the bigger rats are there to stay. Be careful, though. HAH traps are not species specific.
What would you do if.... you went out to check the trap and Mr Stripey and Stinky was in there?
What would you do if.... you went out to check the trap and Mr Stripey and Stinky was in there?