I think she nailed it!!! They are a bonded breeding pair of birds, and if they haven't been handled or had much human interaction recently then they've just been with each other, trusted only each other, and only interested in mating and raising their babies. In my experience as a breeder it is very difficult to bond with a bonded, mating, breeding pair of birds, or to have them be good pets, especially if you aren't their original owner and had them before they started breeding. It can be done, but it's very difficult.
Are you planning on breeding them? Something to think about is removing the nest box and stoping them from mating, either by putting them on a solar schedule, getting them hormone control, and putting them in separate cages. Either way, you've only had them for 2 weeks, that isn't nearly long enough to earn the trust of a bird that hasn't been hand tame in years, let alone two of them that are a bonded breeding pair...Whether you keep them as a breeding pair or you stop the breeding and try to get them to become only pets, it's going to take a long time and a lot of work to earn their trust and get them hand tamed again. It's a matter of working with them every day, little by little, usually for months if not years. You have to start small, just by putting a chair next to their cage as close as you can get where they don't go crazy. Once you find that distance put the chair there, and every day spend time in the chair talking to them softly, reading to them, and slowly move the chair closer and closer. Eventually you next try to open the cage and just let your hand inside the door, day after day, eventually moving it closer and trying to get them to eat some millet from it, then step up, etc. It's all about giving them time and committing to working with them...and deciding if you really want them to continue to breed and be responsible for baby birds...
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