Penn Hip method

[saschia]

Thanks elf for the papers, it is interesting read.

OK, so I understand now that there is an absolute number, which I find reassuring. I agree that for the selection it is preferable to use animals from the better group.

But if there was theoretical situation, that all animals in the group would have the DI higher than 0.3, then I think the solution would not be to breed with the animals from the better half, but to selectively import animals with low DI for the improvement. So if there was no absolute number that had some clinical significance, then using only the comparative method would be insufficient in my opinion.