I have used this temperament test for years and it has never failed to help me select a great pup from a litter: 1) Pick up the pup and lay it on its back with the head in your palm. The pup should struggle. If it does not, put it down, as it will be too passive. If it struggles and can be calmed with kind works and strokes, it is the one. Otherwise put it down it will be too aggressive.