Nah, that 'thing' wouldn't be for me, your average mongrel cur would do that, showing a dog killing something in that way proves nothing IMO.
Damn shame a kid was sold a 'pig in a poke'!
To me, reading and watching your clip, that 'thing' was started too early and maybe in the wrong way but you really ain't elaborated on how it was started?
All that hand catching and chucking one to the pup, nope, shite way of starting IMO.
First off, stop piss balling with made up excuses for working terriers and get yourself one of the tried and tested working breeds, Patterdale, Lakeland, Jack