fat

Hello ! I am new user of this forum.I need an advice for my budgie. It is too fat and it couldn't even fly. Please suggest diet for my budgie. Thank you for your advice.

Kinda hard to tell if she's fat, or just has her feathers fluffed. I don't know how old she is, I found her in my backyard about a year ago. She has a bad foot. Only one talon works. Maybe that keeps her from exercising? Her diet: all she wants: Rowdy Bush, corn, brown rice, apple. She won't...