I was wondering, is there anything in canon that shows what the diet of trolls are? Like they have sharp teeth and Nepeta goes hunting for her food which seems to imply that trolls are meant to be carnivores while humans are omnivores. I was wondering if there are anything in canon showing that trolls might not be totally carnivorous and I'm just forgetting it.

Well Equ is vegetarian and they have cotton candy which isn’t meat.. so trolls as a species are probably Omnivores