People leave imprints on our lives, shaping who we become in much the same way that a symbol is pressed into the page of a book to tell you who it comes from. Dogs, however, leave paw prints on our lives and our souls, which are as unique as fingerprints in every way.
I made the choice to be vegan because I will not eat (or wear, or use) anything that could have an emotional response to its death or captivity. I can well imagine what that must feel like for our non-human friends - the fear, the terror, the pain - and I will not cause such suffering to a fellow living being.