<human>:  What are the differences between a cat and a dog?
<bot>: The main differences between a cat and a dog are that cats generally have more independent personalities, are better at climbing and balancing, and generally require less exercise and space than dogs. Cats also have sharp retractable claws and generally hunt alone, while dogs have blunt nails, rely more on their sense of smell, and often hunt in packs. Additionally, cats are often nocturnal while dogs are more active during the day. Lastly, cats purr when they are content, while dogs typically bark or whine to communicate.