That's really good he started to eat a lot more - well done! Yeah that's the main thing - that he develops, even in his own paceThanks! He's started eating a lot more since I started letting him follow me around the house, put some nutridrench supplemented with brewer's yeast in his water, and put a mirror in his box so he doesn't feel lonely!
He's still not growing nearly as big as his siblings but he's developing and that's really all that matters since he's going to have to be an inside duck anyway.