THIS and it seemed like the perfect way to add one more level to our system. My rabbit set up isn't the same as theirs and my climate isn't the same either, so I decided to make the quail/ worm cages a complete unit that can be moved inside the greenhouse or garage during the winter and go under the rabbit cages when the weather is more hospitable.
Right now, we have 10 quail, Coturnix and Texas A&M varieties. They are close to laying age, so we should start getting eggs soon. The 4 brown Coturnix quail are probably all girls and I'm pretty sure one of the white ones is a girl. I'm also pretty sure that one of the white ones is a boy (It's hard to tell with the white ones) based on behavior and the fact that he does a really cute crowing imitation. I call it an imitation because it isn't like a rooster crow, but it is a totally different sound than the others have been making. I don't know yet if the others are boys or girls, I'm guessing we have at least one more boy based on the fact that we had some fighting going on until I separated some of them out. I only have one making the crowing sound right now though, so maybe the others are all just girls and we were having a little cat fight.