A dog is a Terran animal composed entirely of wikitext. It was, for 4,000 years, considered to be man's best friend, but this title in fact goes to Television.

The first dogs were descendants of the Mangshas of Golgafrincham. They were very fast and intelligent (recorded to reach over 70 mph) and were often used in hunting during the Early Golgafrinchan Periods. 2 million years ago, with all the worst 3rd of the population, they were tricked into going down to Earth.