I also have three. Because we wanted them, not for them - OK I am sorry, the last TIEL is here because my daughter decide after his companion died he would be happier here. I started out with a TIEL. When she was about 14, I was given a Sun Conure. The two of them got along as best buds. The TIEL was a no cage bird so had no territory to defend. The Sun being new to the house looked at the TIEL as a big brother (I think). The TIEL died. About a year later we bought an four month old TAG. I introduced them in a spot not belonging to either. They got along very well. The TAG even taught my Sun how to play with toys ( until then I had been his toy). As the TAG got older their friendship did lessen. They are out together all the time. Sometimes they play, but mostly the tolerate each other. One sits on my head the other on my shoulder - live is good. I would never shut them into the same cage!! So, to say it again. If you get another bird do it for you not Roscoe!!