What cartoon is about a dog that kills everyone? - briefly
The cartoon in question is "Courage the Cowardly Dog".
What cartoon is about a dog that kills everyone? - in detail
The animated film in question is "Madagascar: Escape 2 Africa." In this sequel to the popular "Madagascar" series, there is a scene where a pack of dogs, led by a particularly menacing one, chase and seemingly kill several characters. This dark humor moment stands out in an otherwise lighthearted and family-friendly franchise, showcasing the unexpected turn events can take even in animated features.