A dog is often called a friend of man. She can count, understand hundreds of words and gestures, as well as do basic math. Of course, this is possible with proper training. Experts believe the poodle is the smartest dog, with the highest intelligence.
Domestic cats speak their language. They can retain information for a long time. They are even better than dogs. They can recognize the human voice and intonation. They can express their emotions and desires with the aid of facial expressions. This is rare in the animal kingdom.