So you say, but you are mistaken my good man.
That creature is a dog. Dogs can't be proper Dovakin, only humans can. The reason for this is dogs do not have the right vocal cords to pronounce Dragonese correctly, thus their dragonshouts are relatively ineffective. Why does than his FUS RO DAH appear more powerful you may ask? Well, notice the man dodging the falling debris: he's quite agile and bouncy for a mere human is he not? The only rational explanation is that the mass of this planet is smaller than the mass of earth thus the gravitational constant, and by extension gravity itself, are lower. That means objects will be thrown in air much easier.
Trust me, I'm a scientist.