Am I really the bad guy?

So I don’t feed my dog “human food”. She only gets dog food and that is how I want it to be.

Now, I try to make this clear to other people, but they always end up calling me mean names, because I only feed my dog dog food. My bf even got into a small disagreement with his brother, because his brother feed my dog chicken, and I didn’t like that. His brother called us cruel.

Is it true? Am I a bad dog owner, because I won’t feed her human food?