owned a couple of brians dogs (from brian not crossbred)both very good workers also sensible,would stay for days if need be,in my experiance they have to be held back,from about seven months onwards as they will self enter...unfortunatly one did at 9 months old, blocked it in got my shovel two hours later dug to two foxes,,thought could have ruined the dog some way,six months of age older tried him again,,,,no problems.the only strange thing about both of them was they did not trust strangers at all...i never take pictures,dont need to,but found one not very clear but not to bad.
Chee