If you can maybe let it catch a young rat first they a lot easier on a young pup better that than a big doe nearly size of a rabbit hanging off its nose it’s gonna take a nip or two when it starts and plenty of praise for the pup once it’s made the catch will do it wonders If possible go with a older terrier to show it the ropes nothing brings a dog on than a older mutt showing it the ropes but a dog friendly one last thing you need is another dog nailing pup when it’s meant to be a fun time for the young dog