I was wondering what trainers generally look for when selecting a service dog puppy? I am particularly curious about if you use a temperament test; what is your ideal reaction with retrieve and what test do you use for testing a puppies retrieve? Do the results you look for vary depending on which breed you are evaluating? Have you experienced success with puppies that have all responded a particular way to a certain part of the test? I am curious to see what other service dog trainers have discoved with selection of puppies vs. results. Thanks!