Birds as a general rule eat a variety of foods. It is a personal decision whether to feed your bird a pellet or a seed diet. In any event, they both should be supplemented with lots of fruits and vegetables. Please see my Safe Foods, Diet Info and Toxic Foods Page for more a more in depth look at nutrition and how it effects your bird. It is a natural behavior for a parrot to bathe.
Some birds are easier to convince than others.
Some birds happen to enjoy showers rather a low ceramic bowl of lukewarm water. Aloe has wonderful healing properties and helps moisturize their feathers and skin. Birds never should go to sleep with wet feathers, they can easily get sick. As a result of this, birds should not be bathed in the evening. Who's Taking a Bath Article .