My example = All the time!

The difference between a moral duty to oneself and a moral duty to an animal always makes a difference when it comes to practical application. We all breach duties on a regular basis, those to ourselves as well as to others. When it comes to evaluating our actions and intentions, the source of our duties has a huge influence. For example, if I intend to kill a goat with a claw hammer for sheer amusement, I probably won't care all that much about having a moral duty to myself not to do so. But if I recognize that I have a moral duty to the goat itself, I imagine that that would affect my actions considerably, probably resulting in my refraining from killing that goat. By evaluating the pleasure and pain caused by the act, both those of myself and the goat (thoroughly turning this analysis from deontological to utilitarian in the process) it seems clear that the better course of action would be sparing the goat's life.