This video is supposed to help people who want to introduce rats to each other. So if you are looking for a "mating" video, go somewhere else! This video is NOT supposed to be about "mating" (like some weird people post mating videos of their pets).These are females that I introduced to each other.The "fighting" is normal.They are just trying to establish their hierarchy. I would never ever let my pets mate or breed them, nor would I post videos about that. My rats have always been spayed/neutered. No need to breed!