According to reports, the research team showed some dogs pictures of humans and animals, including their own kind. Amazingly, these canine animals were able to group their conspecifics well. Dr. Dominique Autier-Dérian from the National Veterinary School of Lyon, France, stated that dogs can achieve this by using visual cues. Their primary research task was to test dogs' ability to distinguish conspecifics from other animals. The results showed that no matter what breed of dog was shown in the pictures, they could quickly and accurately recognize them.
　　The study found that dogs can instinctively form a visual classification on dog faces; even with significant breed differences, they can immediately recognize conspecifics. Moreover, their olfactory recognition ability is also very good, which explains that dogs from different breeds can indeed exhibit social behavior with each other. Although under human domestication, some pet dogs have morphological changes, this biological essence is still preserved.