Zoolander and Dogs

In the movie Zoolander, Derek, the male model, can only turn right when he walks down the runway.

He claims he is not an ambiturner.

When I would ask Jasper, my Wheaten terrier Give me your paw he would always extend his right one. And if you asked him Give me your other paw he would extend his left-- but he did not raise it nearly as high and he was always a little bit off balance.

Cosmo, my Goldendoodle, is different. If I ask him Give me your paw he always extends his left. And if I say Now give me your other paw he physically cannot without falling over.

And in thinking about this whole paw situation I wondered if dogs, like humans, have a dominant side of the brain. Are canines right or left paw-ed?

The research says yes—along with cats and horses too.

And if a right-handed (right-lead) horse is asked to run on a left handed (counterclockwise) track the animal will trip and fall over at the turn. Right-handed racing horses can only make right turns. 

It would seem horses, like Derek Zoolander, are not ambiturners—and it is nothing, as the character Matilda Jeffries says in the movie, to be ashamed of.