This is not angel wing, but it is a sign she is struggling. What are you feeding as their main food? Make sure she gets niacin DAILY. (The B complex or nutritional yeast)
Ducks hatch well using the same humidity as chickens. The humidity in the room will affect how much water you need if any. Aim for between 30 and 50 percent the first 25 days then up the humidity to 60-65 and go into lockdown.
If you only have one drake the drake doesn't need to compete for his hen(s). 1 drake with 2 hens should work fine. As they come into breeding he may be a bit rambunctious as he will be trying to get both hens to choose him.
Kalmbach makes an all flock feed. They call it Flock Maker. It comes in crumbles or pellets. 20%protein. I have not checked into the game bird food you mentioned (game food normally has an even higher protein %)
The crumbles are great for feeding chicks and birds of all ages. Add a calcium...
My simple answer to when can chicks go in the coop is as soon as possible. Integrating chicks is easier when they are younger. I have provided a heat source and a safe place with a chick size hole with newly hatched chicks. I have placed chicks anywhere between 2-6 weeks directly in the coop...
My hens hatch chicks in a coop with a ramp. What you should do may depend on your space.
I keep food and water in the coop when I have chicks. My Moms keep the chicks in the coop the first couple weeks. The first time Mom brings out the chicks we watch to make sure all chicks get back up...
My thoughts not backed by research Normally when ducklings are still following Mom the mom is not laying eggs. Since Mom is laying it gives a behavior to mimic that most ducklings don't experience.
It is actually normal for hens to get up while the first pips are happening. No reason to think they are shrink wrapped. (Incubator eggs are in a human altered environment that makes them slightly more susceptible to shrink wrapping)
This could go either way. I have fairly large duck flocks. The majority of my ducks wander most of our ten acres and return to a pen each night. One set wondered off our 10 acre property and insist on staying at the neighbors pond. Another set decided to be part of our Silkie coop. This...
You say you see a shadow. That is how some describe seeing an internal pip. Usually you can see the ducklings move at that stage. Dark room with cell phone flash light shined through the air cell is how I candle eggs.