Maybe I've just always been lucky, but I've never had any problems with intros before, and I've done a lot of intros over the years. At first, before I knew any better, when I did an intro I just stuck them in a cage together and carefully watched them. This had just always worked. They scuffled like normal (over dominance), and then just settled down and were fine. But once I learned better, I started to use the smoosh method, and again, have always had success. That's all I use now, and it has worked for me each time I've used it. Over the 12 years that I've had chins, I've had multiple pairs, two trios (both trios had 2 of the same chins, just a different 3rd one), and even a group of 4. The only trouble I've ever had is fighting way down the line (I'm talking years) on a couple of occasions and having to separate. But I seriously doubt that has anything to do with how I introduce. Like I said, I might just be lucky, but I've never had a failed intro, and that's why I still stick with the smoosh method.