Selective breeding in animals

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Across
  1. 3. Some cows are raised to produce this liquid.
  2. 4. These animals have been bred by humans.
  3. 7. Female sheep
  4. 8. Male cows
  5. 10. This type of dog likes bringing things back.
  6. 11. An operation to stop a pet reproducing.
  7. 13. All dogs are descended from this animal.
  8. 14. Domesticated animals which now run wild.
Down
  1. 1. Male sheep
  2. 2. Female cows
  3. 3. A dog with a mixed genetic history.
  4. 5. This dog is very good at herding sheep.
  5. 6. Dogs can only breed during this period.
  6. 8. Some cows are bred to produce this type of meat.
  7. 9. This dog is cute but overbred.
  8. 12. Alsations and Dobermans do this well.
  9. 13. These animals choose their own mates.