musk lorrikeet shaking

by perri
(victoria, australia)

Young lorrikeet, behaves normal but every now and then she shakes. If you cover her with your hand and pat her she stops. Any idea why? Is it just a comfort thing? Being young she is on a powder nector that she has dry, and wet, I am trying her on solid fruits and veggies next week, could it be something in her diet?
thank you