"If dogs could talk, perhaps we would find it as hard to get along with them as we do with people."
-- Karel Capek
On the one hand, knowing my three dogs, I think this is totally true! They all have their own personalities, and they can be such little brats sometimes. Our boston terrier in particular just glares at us when we laugh at her.
But on the other hand, something about being the fallen-image-of-God tells me that the overflow of a dog's heart can't be nearly as nasty as what we humans do and say sometimes.