He doesn't have to eat out your hand to learn to eat new foods. My birds LOVE to eat from my hand, but I taught them to eat veggies from a plate. I can't sit there for hours feeding them every bite by hand. My hand would go numb!
I am jealous .. I wish my Teil loved me that much. O well @ least he sits on my finger and sholder. I dont think I have ever even petted him successfully befor.. ..

I bought my birds mellet sprey and them each honey treats, to suit their own species.