Snowy (character) he is able to understand human language, and communicates with speech bubbles. His verbal responses to various situations include jokes, expressions of fright, and pleas to Tintin to exercise caution. In the early albums he takes an interest in mechanics and geography; in "Tintin in the Congo", he makes biblical references. As a dog, he also sniffs, tracks, chases, and bites. The character of Snowy evolved through the course of the Tintin series. In early works he exchanges dialog with other characters, including animals, and provides a running commentary on the situation. His character then became affected by the introduction
Tintin and the Picaros on the inclusion of the CND peace symbol, Hergé stated that for Tintin, "That's normal. Tintin is a pacifist, he was always anti-war." Hergé also changed the behaviour of several characters in the story, for instance by depicting Tintin practising yoga and Nestor the butler both eavesdropping and drinking Haddock's whisky. Another new development that Hergé added to the story was Haddock's first name, Archibald. Hergé's depiction of the San Theodoran carnival was drawn largely from images of the Nice Carnival. Among the revelers, he included those dressed in the costumes of various different cartoon and film characters, such as