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?"
Recently I returned from a trip to Italy. I traveled throughout the country and was mesmerized by it's history and culture. Of all the magnificent places I visited, the one that touched me the most was Assisi, where St. Francis was laid to rest. St. Francis of Assisi was the founder of the Franciscan order of monks. He approached life with joyousness and a love of nature, calling all living beings his brothers and sisters.