1. castor   walrus   hedgehog   beaver   cheetah   Hint Half-n-half Clue   2. sapo   whale   stag   shark   toad   Half-n-half Clue   3. puerco espín   bat   penguin   porcupine   panther   Half-n-half Clue   4. reno   bulldog   hare   reindeer   otter   Half-n-half Clue   5. ciervo   ox   reindeer   bulldog   stag   Half-n-half Clue   6. hiena   lioness   walrus   hyena   ass   Half-n-half Clue   7. oso polar   walrus   shark   polar bear   kangaroo   Half-n-half Clue