 You know, you don't want to get a dog that is not known to retrieve if you're looking for a service dog. Because if the service dog can't do the task, he can't be a service dog. And if you need a service dog, then you only need one dog. Your service dog doesn't need to play with other dogs because then he would rather work than play. So when you're picking a service dog, you really need an experienced service dog trainer to help you pick that dog if you're looking for one out of the shelter.