Think it's even that old? Mine was 5 weeks on Monday and it's almost fully feathered (just not the neck yet) and has a crest about 3/8" long. This is my first peachick so I have no idea if it's development is normal for it's age...
yes would say 2 weeks 3 at most....note feathers just coming in on the shoulders(where wings join) so more than a week. Crest starts coming in at 4 weeks.
Pied more likely blue , but could be bronze. blues more common than bronze.
Note the yellow patch on the back....thats where the train feathers will come from if its a male.