Worried about my fiancé...

My fiancé has had the j pouch going on 7 years. He is normally fine during the day, but it seems like every night for the last several weeks he has had accidents. I was referred to this forum as someone said he could potentially have pouchitis. To give a little background, he took on a second job a few months back when his position was eliminated. The second job is physically demanding. He often eats late at night (which I think contributes to these accidents) but physically, I think his body is just run down. He sees his doctor on a regular basis so I would think of he had pouchitis it would have been addressed. His doctor always tells him this is "normal" with this procedure. Is it? If he does have it, what are the treatments? And what causes this to happen?

@virdent - he does take immodium. He doesn't eat too much dairy (stays away from milk and yogurt....really the only dairy product he may eat is cheese, and that's really not an every day occurrence.) He does eat a lot of carbs. I think he eats too much. Is that a common thing with j-pouchers....not getting full? His meals are normally very large...and he gets hungry shortly after.