In the text version Algernon, Charly´s pet rat that he did tests with bite him. In the movie nothing like that ever happened instead Charly did not want him until one of his neighbors in his apartment told him it was a good thing to have a pet. Both the book and the film version of Flowers for Algernon and the book were very different yet alike as I said earlier and I really did like how they were different because it gave it a little bit of a different storyline but its also really good that it was very alike because you were able to see many similarities between both versions and it does pertain to the story