Wow...that's great! It normally doesn't work that way, but I am thrilled that you have him back safe.
You should quarantine the two chins from Aang. They could make each other sick or really hurt each other since they are so stressed. Everyone has been through an ordeal...going to a new home is extremely hard on chins. And, well, Aang's ordeal, that speaks for itself. You need to take it slow and easy with getting them to all get along. Are they all male?