When I used to have pet rats it was very important to either keep all of one gender (or desexed), or keep them far apart because they could mate between the bars. Should one of my boys pass (though hopefully not!), I was thinking of getting a female, but I need to know a couple of things first.
A) Is it more or less stressful for a male to live next to a female vs another male?
B) Should the divider NOT fail in any way, is it at all possible for them to breed? My knowledge of betta breeding is limited, but I am pretty sure that there is no way this could happen since they wrap and the eggs fall to the bottom.