Friend hauled heifer calves 150 miles to a sale barn. The calves were weighed at home, hauled one day, held another day and sold the third day. Calves shrunk 2%. We thought that was awful good. He did feed the calves hay the night before when they were still on the cows, and we all thought that helped. Calves don't know how to eat hay, really, but they sure learn fast when their mothers show them. As a consequence, they most likely ate better in the pens at the sale barn. He did say that this was a dry year and on a wet year they would probably shrink more. He said the trailer was pretty clean when he got to the sale to unload.
I know shrink is an elusive thing, so thought there might be some readers here that would like to know what he found in regards to shrink when hauling.
There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.