I tore out and rebuilt my quail cages. Instead of two large cages I now have 4 smaller ones. Each cage is approx. 2 feet wide and 2.5 feet deep. This will be more than enough room for 4 or 5 hens and one rooster in each cage.
I had a few disappointing hatches and figured that I had too many hens per male in the cages. This lowers the fertilization rate. Four or five hens per rooster is about right.
In fact I just hatched 22 new chicks and it was my best hatch rate yet. All of these eggs were collected after the new cages were built, so success! It was worth the effort.