Stuffies!

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Across
  1. 2. All the cats!
  2. 6. Third dog in 1-down
  3. 7. First cat in 12-down
  4. 8. Cat Team #1
  5. 9. Cat with a month
  6. 10. Cat of darkness
  7. 14. Second dog in 1-down
  8. 15. First dog in 1-down
  9. 17. 1-down's physics
Down
  1. 1. Dog Team #1
  2. 2. Second cat in 12-down
  3. 3. Time cat
  4. 4. Caticorn
  5. 5. Dog that got lost
  6. 7. Second cat in 8-across
  7. 11. Third cat in 8-across
  8. 12. Cat Team #2
  9. 13. Dogicorn
  10. 16. Cat of lightness
  11. 18. First cat in 8-across