University of Arizona researchers have found that some breeds are smarter than others. It was discovered that larger dogs, such as Labradors and Great Danes, have bigger brains than smaller dogs, which gives them improved “cognitive function.” Because of this, bigger dogs have increased self control and high-performing short term memory, which means that they obey the command ‘stay’ more than smaller dogs. On the flip side, smaller breeds were found to be more skilled at other tasks, like going to where their owner was pointing. This is evidence that the little dogs have so-called “social intelligence.” (Psychology Today)