One of the ladies at the poultry swap my sister got her scovies from actually told her about the pellets. She said that ducks could not eat large pellets and the pellets could actually choke them. I have heard a few other people say they feed theirs just regular layer pellets and they do fine.
The multi flock we have up here is a 28% protein I think and is a crumble.
My idea for expanding the pen for the ducks is to add a large area ( 8X8) onto the coop that I have for the chickens. This area will have a dirt floor with sand on top so if the ducks decide to play in their water it will be able to soak into the ground. I am glad to see they can use a regular waterer. I was wondering if their beaks would fit in that. The only hard time would be in the winter because the water buckets freeze so I wouldn't be able to use the bottom waterers then I would have to use a bucket so it can thaw out and refreeze without damaging it.
In the summer I try and leave the doors open so they can come and go as they would like and can stay out if they want unless we have predators. Then I would lock them in for the night. We do have a family of foxes that have moved into the neighborhood and I think they are casing out our house so for now we are in lockdown at night.
We do get really cold at night in the winter (30 below was the lowest this year) so I do put a heat lamp in the coop to add warmth. Can you put oil or Vaseline on their carunkles in the winter to keep them from getting frost bite? Do their feet have the same problems or is it just their faces?
Well if they don't have water it sure will! i have seen my ducks eat frogs so a few pellets aren't going to do harm, i also keep out grit though they likely find most of the requirements free ranging.
28% is pretty high, i'd opt for lower, crumb is tricky they can eat it mine have BUT they also pound it to dust increasing our waste(so $$ loss) That waterer i showed has the base removed it allows ducks to be able to dunk their heads, this is VERY important to avoid sinus infections as well as eye problems... in the winter that set will stay unfrozen till about a -10°C tried it here.. after that you can get heated buckets if you have access to hydro..
here this is what i use..
Also those rubber livestock bowls i showed are excellent you can hammer the ice out!
Again i lock all my birds up night, no way am i feeding the local wildlife.. locking them in secure housing and/or pens is not going to harm them, leaving them loose where preds can attack and/or kill them sure will!
I don't heat, fire and hydro outages lead me to avoid such options. I do use Vaseline on the facial flesh, usually the feet are fine but this bad winter i did have cracking like chapped hands? and opted for the same treatment all birds have healed fine however.