brother and sister breeding ?

In the old days the brother x sister breeding was done and used as a mesuraing stick to were you were at with your line of dogs. It was only done to gauge were you were at in your breeding program. By that I mean if the bro x sister liter produced you some really good dogs and more good than bad then you are in a good place with your breeding program if the liter tuned out more number 2ty than good then you knew your line of dogs were a long ways off from were you needed to be and you either needed to dump that line of dogs are do some serious work on it . A man can either ruin his line of dogs with breedings like this and not knowing what to do are it can make a line even better but only if you know what you are doing. For instance if you have a bro x sister breeding from your great line of line bred dogs and you got ten pups seven are culls two are no better than the mom are dad and one way better than average and you take these dogs and breed back into your line most the time it is a mistake because they are carrying a ton of bad family genes even tho they turned out good themselves . We always went by the percentage of the liter instead of how great the dogs were themselves. On the other hand if you do this same breeding and you got ten pups and 8 are as good as the mom and dad and you got to aces now this is a high percentage liter of dogs . Then you take dogs from this high percentage liter and you breeding some of these back into your line of dogs with some little cross in there here and there and boom man you are in business . This bro x sister breeding helped you because they are carrying a high percentage of the great genes and very little of the bad genes from your family and again it was gauged by the percentage of the liter not how great two dogs were out of ten and the rest culls . Go by the liter percentages and you will end up on top of things , go by the great dog and chances are you will end up on the bottom if you don't know what you are doing .