I don't know the feed question, maybe @Eggcessive has an idea.
I would imagine different species is better than nothing, I just wanted you to be aware of it
Points shouldn't be mixed with birds for health reasons, as well as social reasons. They don't speak the same "language" and thus will still on basic levels be lonely. They need a higher protein than chicks do or they can have health problems, especially leg problems. Chickens also can give...