When will he finish molting?

[The Red Rooster]

I have call duck that hasn't finished molting. Its taken almost a month. He has a little bit green on his head. I was wondering how long it takes for a duck to finish molting.
BEFORE

AFTER

 

[featherfinder]

It took my runners about a month an a half to finsih molting. I think maybe even close to 2 months. They looked horrible during it to!

 

[The Red Rooster]

Lol! They do look horrible when they molt

Thanks!