theres a thread on what ppl feed their bird, I think its kinda a matter of what they were raised on, I wouldnt go changing it on her when you bring her home, but definately be ready to add in all your fresh veges and some fruits into the equation! happy bird homecoming day!
http://www.greyforums.net/forums/showthread.php?196956-Which-pellets-does-everyones-Greys-prefer-most heres the other thread I think every bird is SO different ... its under the bird food topic