
I f you blow on the rump feathers you will see a small feather like a midget one that refuse to grow, even if you will plug this
small feather again and again , it will never grow as a full feather.
This is a DISQUALIFICATION
As a breeder we should never breed from a split feather bird, there is a good chance that this default will show in 75% of is youngs
Comments by Robert Raymond.