You can train a dog to fetch, sit and stay, so you can probably train a dog to hate the Dallas Cowboys, right?

As we see in a new YouTube video making its rounds, the answer to that question is a resounding "yes."

A Washington Redskins fan films her dog, Dexter, as he waits patiently for some duck jerky. It is Dexter's favorite treat.

But when Dexter hears that a certain piece of jerky is associated with the rival Cowboys, he won't have it. He sniffs it and looks away longingly. Even he has some standards.

Talk about solid training. Dexter would probably kill for some more duck jerky, but just hearing the word "Cowboys" is a turn-off.

This is rivalry at its finest.

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