Feather Dusters

I currently have two dusters in my aviary.  I have bred over 90 chicks this year, and these are the first duster chicks I have had. I have had both their parents, the cock and hen up with different partners that didn't produce any dusters. Both the cock and hen come from very good stock, I should also say that there was also 2 normal chicks (as in not being a duster) and they look to be a very promising chicks. I have let the parents go another round just to see if they produce any more dusters, I will never mate these 2 birds together again. Here is a few pic's of the dusters, they where born 6/07/2000 & 6/09/2000 they where the 1st and 2nd chicks hatched in the nest.