Modern pet dogs are not just changing on the outside, with ever more specialized shapes and sizes, they are also quietly reshaping their brains. A growing body of research now suggests that the brains ...

The role for which a dog was bred—say retrieving birds—is reflected in their brain structure, according to a study of 33 breeds.

A research study in Europe says modern dog breeds have brains larger than those of ancient breeds. The team credits the evolutionary change to the more complex social environment that modern dogs ...

Gifted dogs can categorize toys by function, not just appearance. In playful at-home tests, they linked labels like “fetch” and “pull” to toys—even ones they’d never seen before. The findings hint ...