If we observe horses and want to learn from our observations, it is very important to look closely.

Because, at first glance ...
the chestnut, as boss, is putting the unruly gray back in his place, an everyday horse interaction,
dominance in play -- we know all about that. And, to begin with I comment on these photos in the typical way, appropriate to that kind of scenario.
But these horses do not conform to our human norms and patterns...

See for yourself!
Click on the first photo to follow the game. 
Remember to also read the text hidden behind the photos by running your mouse over the pictures.

After this game, it continues with:
Games: are they only for men?

or, for further reading
Thoughts on Play