If you can make a 'second story' (a cookie sheet can be sufficiently propped up to work well for this), you could put their food and water on the second level. This would give your birds full access to the bottom level to move about and would give you space for 3 hens, 1 cock. Otherwise, this cage would only comfortably house two birds. Six to eight inches between the bottom and top levels will also provide privacy for your hens to lay, yet not hinder mating attempts. Japanese coturnix quail tend to jump up to / down from the second level, so stairs won't be necessary.
but that's only if it had a wire floor.
