I feed Pita Zupreem Natural Pellets, fruit pellets, vegie pellets. He loves fruit, but not to keen on vegies besides corn.
There's a really good recipe for birdie bread that has vegies in it, and Pita LOVES it....He gets it everyday, I just mix different things in with it so he doesn't get bored of it.
Here's the link
Birdie Bread for Amateur Bakers