Depends on the enclosure size, and the individual male. I had 2 males and 5 females in a HUGE enclosure. Each male seemed to have it's own particular female, and I didn't notice any visible signs of stress. I have one male alone. He's very aggressive with both males and females, and bothers the females to mate constantly. I've tried him with different females, and once in a mixed group, to no avail. He's stuck as a bachelor. My advice is one male to 2 or 3 females if you have the space, and you want all the babies they're going to produce. Otherwise a small group or pair of females is nice too. JMO.