I took him to the hospital last night and it turns out that it was an episode of his colitis. The doctor said that the candida diet and the colitis diet are very similar, so either way it can only help him. He also said that garlic and probiotics are also good for either case so it would be good for him to go on both of those. Today he is feeling much better, and he is starting digestive enzymes as recommended by the doc. I was surprised the conventional doc was as open minded as he was.