I was gonae ask the same have u used a gun at the end off the dog or previously when broken thru lifted him regular or the other way round pushed him onto it which maybe the part he does t like or became familiar with. I reckon ul get a lot off answers some sensible some not but unless someone can see it happen u won't get the answer ur looking for here not fully, like the guys say try tying him back on a dig or leave him a little longer to settle in, give some encouragement on the break through there's lots of methods to try. If he's staying till dug to he ain't jacking well not to me keep po