No, this is normal - you feel for the innocent who cannot speak for themselves. I think most decent people also have genetically ingrained in them what I consider a sacred human/pet contract. We chose to breed dogs (and cats) over tens of thousands of years to love us, need us, and be loyal to us in exchange for really minimal things from our perspective - a meal, a shelter, some socialization. When another human treats a domesticated pet animal poorly, it is a breach of that genetic pact. Pets don't have the ability to enforce that pact - only you can speak on their behalf.