The originality score is because of too many dog pictures I've seen.
And I've seen a lot of dogs - you've captured them really well.
I love how you've shaded both; their hair, their muzzles, the teeth on one of them, and the solemn gaze of the other, the whiskers, the nostrils of the leftward dog (which is very fine detailing, well done there), and the well done lighting on the other dog's face at the point between the eyes. Its really amazing.
I've been a dog lover - I admit not to being the best caretaker, but I love dogs a lot, and your deviation reminds me why. Bravo! Well done! Keep drawing!