I've never actually brooded any muscovy. The hens did it all. I was vaguely thinking about giving these geese to a broody muscovy. I have read some do that.
They shouldn't be brooded with chicks? I read an article that said someone did that, but it sounds iffy.
What feed type do I need? Can they be raised on a a non medicated chick starter, or should I get a flock raiser?
Will they get along with my chickens mostly? There's a bit of back and forth between my muscovy and chickens but generally nothing serious and birds can get away. We did butcher a muscovy drake we bought at a swap because he kept attacking a rooster and ripped his comb off. I don't know how he was raised. So far my young muscovy drakes are leaving the chickens alone mostly, but I got my eyes on them.
I don't brood with chicks, just because even if you do use a homemade gosling waterer, they still get the brooder a bit wet, and chicks don't handle that well. Plus, they grow so fast, they could accidentally hurt a much smaller chick just by stepping on it accidentally.
I personally use either an All Flock feed or I use Naturewise Meatbird, which they do really well on. It does have a protein percentage of 22%, but that's actually not too high, and I've never had any develop angel wing on it.
I think breed choice plays a role in how well they'll get along with other poultry. I have never once had a problem with my Romans, and Sebastopols and Americans are also supposed to be very docile and friendly. There are some more high strung and aggressive breeds that might cause problems, like Chinese.