Now I have chickens and quail, but my quail have elevated pens and are about 10 feet away and outside of the chicken run. I go in to feed the chickens in the morning, and DW feeds the quail, so there is no transfer of disease, if any to any fouls.
Now I did have a post on here that I did have some quail directly in the same coop and run with the chickens. They did well. Would I recommend it? No. those quail did get pecked on, not bad, but still they were missing some feathers. Was it the wisest choice? Not really, but it was sort of an experiment in bird management and health. Did any of my quail die? No. and they are still alive, laying eggs and very healthy. Mostly it was for coolness, and for repair of their pens. We dont have a garage, nor extra empty sheds.
I would side on caution, and experience from some of the more experienced aviary keepers on here about keeping chickens with quail. Learn from them. Mine was a fluke, a one in a million, but I had to try.
Would I do it again?
NO.
Too many things can and will go wrong.