Dogs come in a wide range of sizes, with males typically weighing up to 109kg or 240lbs, and standing up to 89cm or 35 inches tall. Dogs should drink 50ml of water per pound of body weight each day. They eat three times a day and sleep 12 hours a day. Greyhounds can run at an average speed of 17 miles per hour. The author showed habits of mind by persisting to find information and thinking about their own thinking.