that is exactly what I mean my black dog was killing rats confidently at 6 months
Leethdog you sound like a young man eager for action like many of us when we started off our life with working terriers. You will need to be patient for your dog’s sake and for your own future enjoyment of watching them hopefully develop into a worker that will make you proud. Some terriermen never learn such patient’s and consistently ruin pups and are constantly cribbing about poor dogs from poor lines and also chopping and changing their kennel. These same men rarely have consistent stock.
A simple comp
Personally I don't think they can call it their own line if they're just carrying on another mans work. Now if they had done some outcrosses then folded them back in to the line I think they'd have the right to call it their own distinct line after a fair few generations.
it's like a family tree