I can't speak for Doms or Javas, but I think I can speak to the Dorking situation. Whites and Reds need work, but are not a lost cause. I gave up on Silver Grey Dorkings after seeing birds from 4 different sources, and hearing of 2 other sources which were no longer selling SG Dorkings. There are 3 other relatively recent-onset breeders of Silver Greys, CapayKim on BYC as well as 2 other farms not on BYC....Javas are not a lost cause... Not sure about Dorkings or Doms...
Best wishes,
Angela