Barking Big is a story of perseverance. Dr. Dan Castillo will take you through a very unique and unorthodox path, certainly far from the cookie-cutter path of college, veterinary school, and work. This book talks about the author's early childhood, his wild youth growing up in New York, his days in the Dominican Republic, and his journey through veterinary school in another language. The author will take you through his experiences, both good and tragic, that will lead you to four states—New York, Massachusetts, Iowa, and Virginia. This story is a must-read for all those who have been told they will never make it and are determined to prove those naysayers wrong. It is also for parents or guardians who hope that their kid who may have lost his or her way will find the right path and succeed. This book is about learning to fail, getting through the roadblocks, persevering, and dreaming or barking big.