the way i have introduced mine is to put 2 cages side by side so they can see and smell eachother and almost touch eachother. Then every couple days switch the pouches around so thay all get used to eachothers smell. Depending on your gliders it may take a week or 2. just pay attention to and crabbing or reaching through the bars trying to grab eachother. then start to introduce them outside of the cage maybe one at a time. hold them in the pouches and put them close together (but not too close) and see how they react. It may take some time for them all to bond.