REHABBING A BABY HAWK HELP?!?

We are rehabbing a little hawk fledgling we HAVE contacted pro rehabbers but for a few days to a week we are responsible for it. WHAT TO FEED IT? HOW TO FEED IT? HOW OFTEN? WHERE TO KEEP IT? HOW MUCH WATER?! please help I'm so stressed I don't want to be responsible for the death of a beautiful baby hawk