Here are a few more notes on important aspects of the plumage of pure Onagadori.
Note here in these illustrations that even though this Silver Duckwing has an excellent tail length and fullnes, it lacks the highest quality saddle (1/3 the length of the main sickles of the tail). I have noted for you the extreme length of the actual flight feathes of the tail.
This is another detail that shows the level of quality in an Onagadori = the small grouping of feathers UNDER the tail. These should also be much longer (up to 5 times the length) of normally-feathered birds. When selecting which rooster to set into the breeding pens, use these quidelines to aid you in your choices. In this way one can be sure to preserve the quality of a good Onag.
(Onagadori page one / page two / Care Instructions / Festschrift - Translated / Aspects of Breeding 1 & 2 )