IF you have a lot of time on your hands, it can be done, but if you don't. I wouldn't suggest it. Best to keep them apart in separate rooms to begin with so you can observe any sickness with the new birds. Other birds WILL react to aggression behavior! When one freaks out, the others follow! So training needs to be done in separate rooms. Be sure to sanitize your hands every time you handle a different bird. It does take a lot of time to bond with the new bird/birds. When I bring in a new one, that is the one I spend the most time with. It is important to bond with the new bird as quickly as possible while the bird is still new, not saying you would be like bread and butter, but at least your able to hold and such cause that takes time. Not everyone feels the same way, but that's always been the way I have done.
