I have an African Grey parrot, and if I fed him only seeds and pellets, he'd go on a hunger strike. The bulk of his diet is fruit, vegetables, and a seed/pellet mix.
He also likes pizza, hot dogs, ice cream, peanuts, cookies, mashed potatoes, chicken and pot roast. He doesn't get these every day; just as a special treat now and then. Does Rocco like human food, too?
BTW, pet birds are also invited to the "celebration." No dogs or cats, for obvious reasons.