You answered your own question you got no bitches because there not hacking the work your dogs do thats why you havent got any. same with most. Carry on chasing that bitch that is pure bred to a line of workers that will do 6 seasons and say 300-400 digs to funny fellas from 2-20 foot stays 48 hours in the ground and is bred the bollocks. you might get a handfull in yourlife time but you will get maybe 20 dogs to do this out of the same breeding maybe more.
the easy option and what most do is put best to best be it border, russell, patterdale and you might get workers and the bitches might