QuickCheck: Are dogs capable of judging how useful a human is to them?

DOGS – people have welcomed them into homes and considered them a part of the family for centuries, or at the very least a useful companion. We humans use them for all sorts of tasks, ranging from search and rescue work after disasters to morale-boosting companionship.

That said, people have often attributed many traits to dogs that are usually the realm of people – such as their ability to size humans up by how useful they are to them.