I have a bird...what to feed it?

Its a baby, I mean I would know what to feed it if it was an adult. But its a baby, and I don't know what else to feed it besides worms and crushed berries. Does anyone know what else I could feed it? And also, I have a dropper to give it water, but I'm afraid to give it more than it needs. Any ideas on what to do there either? Thanks.