Do competitive eaters fully digest their loads?

Factual Questions
1

Surely there is an upper limit on the amount of digestive juices someone can produce in a day, or does the food just backup for a certain amount of time …or does a lot of the mash come out only partially digested…D:

I’ve always wondered if you can overwhelm your digestive system…

2

This isn’t really on topic for competitive eating, but it is rather simple to overwhelm your digestive system.

Eat a whole stick of butter for breakfast (and nothing else) and I can almost guarantee oil will come out your digestive system.