Detailed Instructions: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: My friend was walking her dog when suddenly it howled in pain. Sentence2: The dog stepped into a poorly placed coyote trap near the sidewalk. Sentence3: While my friend ran for help the dog managed to pull her foot out. Sentence4: They went to the vet and the dog's toe had to be amputated. Sentence5: The dog and my friend are now recovering from a very scary walk.
A:
Dog, Vet, My friend