I asked this question not long ago myself. I got the same answers, more or less no. So I decided to run my own experiment. 1 male and 3 females (all unrelated). Now I have somewhere around 10-11 breeders, 3 males, and a bunch of babies. So far no issues with development/behavior. I'm at 4 generations right now, I would be farther if I didn't feed all of the babies in some litters.