I haven't seen any mating rituals or actual mating yet. They all hang out with each other all the time. The white-brown female (sorry I am terrible with Button colors) was calling and my silver female answered, my silver male answered, the black male from her cage answered. My silver female started calling back and everybody answered again. This went on for 2 hours. The white-brown female seemed really stressed out, pacing around endlessly.
They are all piled up now in one corner. Guess they are all late bloomers...