In the novel, the monster is a vegetarian. This can be interpreted in a number of ways. First of all, his vegetarianism coincides with his ostracism from humans. He is more related to animals than humans, and therefore cannot eat them. It also show his benevolence; the monster cannot bring himself to eat other living things. His vegetarianism also alludes to the number of old tales that feature vegetarianism, such as Adam and Eve and how they did not eat meat until a great evil brought about meat eating and death. This facet of the monster's personality adds depth to our understanding of his actions. We get to see that he is unlike humans, and therefore more likely to kill. Also, it connects to his birth. The monster was created from parts partially from a slaughterhouse, and it is therefore unnatural for him to eat animals slain in the same place parts of his body originated from. -Clayton
Adams, Carol J. "Adams, "Frankenstein's Vegetarian Monster"" Adams, "Frankenstein's Vegetarian Monster" 1990. Web. 14 Dec. 2015.
Adams, Carol J. "Adams, "Frankenstein's Vegetarian Monster"" Adams, "Frankenstein's Vegetarian Monster" 1990. Web. 14 Dec. 2015.