There is a difference between a working line and a pet quality dogs, you can also get some lower drive dogs from working line litters. For family pet dogs getting a high drive dogs is not the best choice in most situations.

When looking at dogs either puppies or adults you can usually get both from, some you may not know until the dog is a little older, but lots of breeders can tell at the start and can help you pick out a dog that suits your family lifestyle.