What diet does a person with Crohns disease have to follow

My brother was just diagnosed with Crohns on Thursday, but can not get into the doctor or nutritionist for a week and a half. What are the diet guidelines that he should be following until he can get into the doctor so he wont be aggravating it?

My mom and aunt have crohns and each have a list of different foods they have to avoid- its an individual tollerance thing- but i did look it up and heres a link to check out that should help-

http://www.webmd.com/ibd-crohns-disease/...

If he's been sick long enough to have crohns he should have a pretty good idea himself what he should stay away from-

best of luck - and crohns can happen at any age