I recently adopted an African grey parrot, and she is extremely picky eater how do I make her eat a?

Parrots see with the use of ultra-violat light, what we see as colours they see differently, many foods presented appear differently in colour to them than us and they perceive them to be something different, even poisness, try placing a ultra viloet l ight near the cage or even posision the cage at a window with natural sunlight.