11.   If an animal is to avoid fighting with another, stronger animal, it must first test how strong his opponent is.

12.   If the training starts at a young enough age, when the animal is still a puppy, it all comes naturally.

13.   If you have a pet, ask your previous landlord for a reference letter stating that your animal is well-behaved.

14.   In early days the packs had concentrated on the caribou, but the semi-domestic, smaller animals were easier prey.

15.   In learning experiments, animals are stressed or hungry, they receive sensory inputs, they perform motor tasks.

16.   Like families gathered at Christmas, social animals are poised between cooperation and conflict.

17.   Many animals are frightened of fireworks.

18.   More animals are out and about, running around.

19.   Most animals are afraid of fire.