The dog is the most popular
among household pets in the world.
Almost every family has a dog living with them
and they are always considered man's best friend.
Like the chimpanzee,
the dog can be trained with a lot of tricks
like retrieving balls or anything else
that owners throw away from them.
In circuses around the world,
there are many animals involved
that entertain the spectators
for they do incredible tricks and stunts.
In the video below,
the chimpanzee is leading the dog
to cross the river
by jumping over stone slabs
until they reach the other side.
The chimp is clearly the guide,
while the dog is obviously hesitant
but still able to cross in the end.
These are stories about relationships between humans, animals or between humans and animals.