The idea that dogs are more intelligent than cats has been called into question.Japanese scientists say cats are as good as dogs at certain memory tests,suggesting they may be just as smart.A study—involving 49 domestic cats—shows felines~1 can recall memories of pleasant experiences,such as eating a favorite snack.Dogs show this type of recollection—a unique memory of a specific event known as episodic memory~2. The idea that dogs are more intelligent than cats has been called into question. Japanese seeds say cats are as good as dogs at certain memory tests, suggesting they may be just as smart. A study-involving 49 domestic cats-shows felines ~ 1 can recall memories of pleasant experiences, such as eating a favorite snack. Dogs show this type of recollection-a unique memory of a specific event known as episodic memory ~ 2.