Though I no longer breed Silkies,but I did rather successfully for a lot of years. I washed my birds in Dawn dishwashing liquid. Rinsed well, and rinsed again in Downey fabric softener. If I was washing a white bird, I then did a final rinse in water with bluing added. Downey comes in all sorts of scents, and cuts eau de chicken rather well. Then blow dry, and powder vents, bottoms of feet, and beards with talcum powder to keep them clean. This was blown out at the show. Make sure you use 100% TALCUM powder, not cornstarch baby powder, or you'll turn those feathers to glue!
Vickie (Karesh) Dawson