A person standing still 300 yards away is almost invisible to a dog. But a dog can easily identify its owner standing a mile away if the owner is waving his arms.
Dogs do dream! Dogs and humans have the same type of slow wave sleep (SWS) and rapid eye movement (REM) and during this REM stage dogs can dream. The twitching and paw movements that occur during their sleep are signs that your pet is dreaming
The biggest wildcat today is the Siberian Tiger. It can be more than 12 feet (3.6 m) long (about the size of a small car) and weigh up to 700 pounds (317 kg).