Pointer,
A freind of mine has bred borders for some time and granted they can be slow starters , His sire didn't start until 3 years old, He has a 15 mth old bred from his original line 3rd or 4th gen I think and this has already started I seen here kill her fisrt fox in under 10 mins stone dead throat hold, It taken her time in finding & entering usually dropped in at the end of a few digs to get her going, She now is working well and finding on her own, Just a pity season has ended for her as she could do with a few more under belt, I think with borders or any other terrier you have