Animal behavior and body parts and randomness

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Across
  1. 5. Striped tails; likes trees
  2. 7. Flying mammal
  3. 9. Longest word in history; extreme levels of happiness
Down
  1. 1. Large marsupial that likes to box
  2. 2. Soft on the inside hard shell
  3. 3. Like to be in packs; dogs cousins
  4. 4. Eats carrots and lettuce
  5. 6. Man's best friend
  6. 8. Likes to chase mice
  7. 10. Has a trunk