I rescued a 15 year old Congo African grey. I have been feeding him Harrison's Adult Lifetime Coarse Bird Food, although he does eat it it is the only thing he eats. He is soooo pickey he won't eat ANY fruits or veggies, I have been leaving them in his cage but he won't even go near them, he doesn't even eat nuts of any kind. I know that the pellets as nutritious as they are, their not giving him every thing he needs. So my question is should I add a supplemental feed that maybe has some dried fruits and veggies and seeds, and see if he will eat that in addition to the Harrison's? if so what brand do you suggest? Thanks.