is it very hard to do that,? ive done it with lots of lurchers over the years, but never terrier . I know they prob no the difference from pups around the yard etc, but in the heat of battle would a terrier maybe get hot headed with rats flying all over the place (not rabbits)!. I know jacks are clever my son got one little woody lol, and bright as button, maybe you can train them with the smellies but maybe more of a challenge than a lurcher lol .
i would say my self it a not hard job to do break terriers pups to ferrets it just take longer than breaking lurchers to ferrets. terr