Of All the Animals, The Cruelest is Man.
All the Little Animals is a 1998 feature film, directed and produced by Jeremy Thomas, based on the novel of the same name by Walker Hamilton.
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An emotionally challenged young man named Bobby (Christian Bale) runs away from home in order to escape his abusive stepfather who has killed his pets. He meets an old man, Mr. Summers (John Hurt), who spends his time traveling and giving burials to animals that have been killed by cars. Bobby, also having an affinity for animals, becomes friends with the old man and aids him in his task.