hi! i'm new to BYC as a member but have been visiting the site a lot in the past couple months. i recently got 3 magpie call ducklings (Alice, female; Ziggy, male ; Eleanor, female!) that are about 5-6 weeks old i think. at the very most, 7 weeks. they were sexed by a vet. i also have 2 buff orpington ducks, both male- Monet and Milo. i was wondering, Monet has a slightly purple bill. what is the reason for this? Milo's bill is bright orange! also, although Monet is a sexed male, on his head where his feathers are starting to puff out, they're the same color as the rest of his body. does the grey/green head come later in life?