Butchers around the town of Rottweil, in Germany, refined the
dog in the Middle Ages until it was so good at its job that cattle could be taken to and from the
stockyards without a human attendant.
Chesapeake Energy donated use of a 4,000 - square - foot warehouse in the Fort Worth
stockyards to temporarily house the animals, and PetSmart Charities donated several hundred
dog crates,
dog food and water bowls.