my brother had a terrier that would bay steady for as long as it took for him to get a chance to take hold. then he would strike and all went quiet . then you where digging to a dead fox. he took very little damage until his age caught up with him . on hindsight this dog wasnt clever he just didnt like to get bitten. lol. he was a very handy terrier and seen a lot of work never changing his style of work.