you should keep the quail separate from chickens, quail are susceptible to poultry diseases and be wiped out much easier by cocci etc than chickens. I suggest just making sure your chickens can't poo into the quail cages, and are you going to keep the quail off the ground? to put a piece of plastic under the cages, or build a pull out tray to make cleaning much easier. a piece of cheap plastic can be taken down and washed off of poop and replaced every week, or tossed regularly. Quail poo ALOT...Of course you can just put sand under the cages and the chickens will go under them and root through for food bits and bugs attracted to the quail poo.
