Americana (EE with traits similar to Ameraucana)do not fly any more than other chickens. There is no standard, so traits and personalities may vary more than breeds with standards.
The simple answer is yes they can still hatch. How long have there been twelve eggs? How many days has she been sitting part time? Many ducks when they first go broody don't sit 23 hours a day, but later become more committed.
It will not develop angel wing due to feeding 20% protein. I don't know about Muzuri's starter as far as other details. The feed I use is designed for all stages of life.
My eyes aren't great and sometimes miss pointed saddles in pics, but I would think the pointed feathers would be becoming obvious, and crowing regularly in 20+ week old males
My breed guess is Leghorn over Marans. Could be another red bird in the mix. With that mix I believe these could be...
Try to get your lone little one in site of the older ones. The more it is with them the easier it will be for it to become part of the flock later.
As you know ducklings grow quickly. I would actually start putting them together in the next week or so. The integration will be smoother if the...
Ducklings are sometimes as uniquely colored as adult ducks. Being they are from a farm their is a possibility of mixed breeds. In ducks mixed breeds may mimic other breeds.
If you can get a picture of them standing it may help.
My first thoughts are a Pekin and a dark Welsh Harlequin.
My ducks stay in their pen at night and are free range most days , but we have a welded wire fence that was originally built for a dog. It is 4 feet high. 100ft*300ft area with Green posts for sides and wood at the corners. I have had only one duck fly out even though some of the others are...
The other possibility of blood in eggs is if they are being kept warm by a duck sitting on them or temperatures in the 90's.
As far as egg color that is genetic. There is not a standard about what each breed of duck should lay, so any breed could have blue, green, or white layers.
Cayuga...
Bricks are not all that heavy. Even a coon could push them around. Any digging near them could move them.
I would suggest a game cam if you really want to know what is around the coop at night.