Guys, if you haven't read Undaunted Courage by Stephen E. Ambrose you need to get a copy. It's a "must read". One interesting occurance is that early in their trip heading West members of the Corps of Discovery expressed dismay at being served dog at Indian feasts. But by the time they were heading back East they had developed quite a taste for dog meat and were concerned about how they would get it back home without upsetting their friends and neighbors.