Dog and Duck

I’m not into cute animals in movies, I even hate them and mainly hate those who prepared the movies RRRR waste of time but this one is quite interesting.
What do you think about this obscene :p relationship! Why the duck is acting like this?

Is this duck the dog’s bitch?
Is the duck taking advantage of the ferocious dog for protection? (I doubt it personally)
Is the duck blind, and this is its guide dog?
Is the duck an ass licker? Following the dog for food (God, I know lot’s of those in our human world)
Is this an imaginary duck, the dog can’t see it, we just do?

What do you think?
I don’t