Animals usually eat the same type of food all through the day. They don’t have different meals like we do.
In the case of giraffes, they usually eat twigs, leaves and fruit from trees which they can easily reach with their long necks.
If you would like to have breakfast with a giraffe, please see the below video of Giraffe Manor.
For a more general video on what giraffes eat, please see below.
For more reading on what animals eat, please see the below book(links to Amazon).