Foxdropper,with this line-breeding and you seem to come across as you know what your talking about if for instance you have a very tightly line bred dog and bitch and you breed these,what percentage of the litter would you expect to make the grade as i read where a lot are saying if 50% make it there happy,my question is why should they all not make it if they are bred correctly?
Personally i would expect 75% of a litter to make what i consider useful digging dogs ie stay till dug to .I get where your coming from with why not all the litter and i dare say some people would keep the other