I have three parrots, Ana Grey my 3 year old TAG I have had since she was 4 months. She is the Queen of the roost and very aggressive. Louie the BF Amazon, is also 3 years old, speaks Hindi and is just learning English. Louie has been part of the flock for 11 months. He is usually just a laid back clown except when it comes to Ana Grey or my new baby, Sterling Gris, a 5 month old CAG, who has been part of the family for one month. Sterling is larger than either of the older two and will stand his ground if they come after him, which they both do as well as each other. That's right, none of them get along at all. They nip and fly at each other. I live alone and am retired so they are out most of the day with me in constant supervision. I still have high hopes that they will some day get along. If they start bickering which they do all through the day, I just cage the most aggressive culprit (which can be anyone of them) and take a rest!
I will say, I love my zon. Louie is a blessing and so much fun to watch "kill" his toys. To me, it is worth the diligence I have to have, to have the three kinds of parrots I really want!