I don't know about crohns, but I had a bad case of Ulcerative colitis which I have been told isn't as bad as Crohns.
Basically the same symptoms, and I got rid of mine on a 21 day fast, coupled with Self Hypnosis. My bloody loose stools returned to normal.
The SH part of it is to tell your subconcious mind what you expect from doing the fast. The SM is the mind of the body,l and there is a direct connection. You use visualizations, and suggestions.
Somebody posted about pastuerized, and homoginized milk causing Crohns. I can't find it know. It might have been in this video. Worth watching anyway, as it has to do with proper food choices that I'm sure are a part of the problem. This video is a 2 part video, the link to the other one is on the page of the first.
I just read about Crohns here: http://tinyurl.com/2rkl67 They say it most likely is caused by bacteria, or a virus.
If that's the case, I would suggest MMS which will kill bacteria, and viruses on contact.