Only humans are vegan.

Few gorillas were seen distributing pamphlets and letting their local community know of their superior dietary philosophy.

Animals are classified as herbivores, omnivores, or carnivores.

Gorillas are omnivores with a predominantly plant-based diet.

Can gorillas become vegan?

Good question.

Gorillas are not vegan, they eat a significant amount insects. They also opportunistically eat small (vertibrate) animals. They also eat a whole lot more than humans.

Yeah, but gorillas have a different digestive system to humans.