The tone of the poem is scared, concerned and confused.
The author says the neighbors dog is purple, then describes its eyes and its tail. The next stanza starts with saying the dog is quiet and she is scared of it. The final stanza says that the dog is nasty and before it was painted it was a crocodile.
What is happening in the poem is: She tells you that her neighbors dog is purple. Describes the dogs eyes. Then the tail the next two lines. The next stanza tells us that the dog is really quiet and she feel afraid of it. The final stanza sta