In my opinion according to what ive seen in my breeding; the chicken does look like a cochin australope cross. i have chics that are similar to that chicken. I raise cochins,polish, ,silkies ;i have a easter egg chicken, crested breeds and old english. From my experience with the various breeds ; I have learned that in cross breeding a cochin and another breed; that the feathered leg trait is dominant. The dominance of this trait is produced by breeding a rooster or hen cochin to another breed. My crested rooster x cochin hen produced a white beauty with feathered legs.
My game rooster x blue cochin hen produced adorable feathered leg blue chics. Some while back my cochin rooster x black sex-link hen and rhode island red produced black feathered leg chics. Now you see how I came to my conclusion concerning the feather leg trait being dominant.