Animals have no doubts because they have no minds (ego). A cat does what a cat is supposed to do without any judgments or considerations. It chases a mouse and if unsuccessful it pursues another option to feed itself. Have you ever seen a cat, or any other animal for that matter, to put its paw on its head saying "you're such a bad cat because you couldn't even catch a mouse?"
"There should be less talk; a preaching point is not a meeting point. What do you do then? Take a broom and clean someone’s house. That says enough." - Mother Teresa
The most effective way to teach anyone what we would like them to know is through action, not words. Often endless hours are spent in conversation, taking classes and expressing our frustration about what we find objectionable.