It is easy to eliminate an unwanted gene if you know what it is dominant to. All you need to do is test mate each animal to something that is recessive to the gene you want to eliminate, to see if it is carrying the unwanted gene . Not very practical with dogs I must admit and only works for visible traits. ..
lol a man of your talents is wasted on the huntinglife you should be in a laboratory dealing with human malfunctions lol