The curious incident of the dog in the night time

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Across
  1. 2. the dogs name
  2. 4. bad colour
  3. 5. what killed the dog
  4. 9. what type of dog was the dog that got killed
Down
  1. 1. christophers favourite subject
  2. 3. man's best friend
  3. 6. the age of christopher
  4. 7. good colour
  5. 8. the rats name