Well sort of. The more you get the better the chances of a more even % of each, with an even number the pairs will pair up. They do pair up pretty quick under those circumstances. They wont show actual breeding rituals, just kinda get cosy with eachother. If you have 6 or 8 and two stay real close to eachother that are different sized, very likely a pair. Two different sized ones of the same --- will face off.