I only have one Sultan and one Silkie, they're both about 8 weeks old. They've gotten so dirty in their little home! The Silkie has poopy bum, the Sultan's feet are so dirty and the feathers are still sheathed! And both of their little crests are dirty and layed over. So, any advice on giving these dirty birds a bath??? Oh and what about the Sultan's sheathed foot feathers? Should I be concerned? They're so long!