To be honest, I'm not really sure. I have a few ideas just off the top of my head, but because those weren't steps we took I can't say whether or not they would have worked.
- More hands on interaction and training when Mojo was a baby. Although the sources I found for advice on parrot training said you should only have one person training the bird in the beginning because it can get confused. Now I know that we could have trained him separate tricks, just not worked on training the same trick to him.
- He should have been the main person to interact with Mojo once he started showing preference towards me. Although my husband was the one to take him out of his cage, to hand him to me, and would even take him out to play on his play stand when I wasn't home. He's also the one that feeds him most days. My interaction with him wasn't limited though, my husband was too frightened of birds to be the sole person caring for him, plus he didn't know anything about training him or his body language.
Those are a couple of things that I would try and do more of if we could do it over again. Again, I don't know if those steps would prevent the aggression that we're seeing now. Amazons are known for getting extremely jealous, possibly the extra training and handling wouldn't have been enough to overcome that tendency. Unfortunately there's a lot of information I didn't come across until after there was a problem, before Mojo was flighted he would allow my husband to handle him without any problems.