+1 on the Go Broncos. Not sure how the "sorting" part works exactly. Obviously the animals don't go down the conveyor belt, I think they have an area out there somewhere out of the way where the animals can just relax in their stalls. I assume that the animal attendants are given access to check up on them and maybe feed/water, but I really don't know for sure, other than that its a regular occurance for us. This one we just managed to turn into a media event to get some free Super Bowl advertising.