Americans own 73 million dogs and 90 million cats, considering them best friends, soul mates, family members, and even surrogate children. Relationships with cats and dogs are some of the longest and most intimate of our lives. Why are we so attached? Animal behavior experts, evolutionary biologists, veterinarians, and pet owners all get personal in a series of interviews and stories that are insightful, funny, heartwarming, and life changing. One couple sells their home and business and sets out on a cross-country trip in a Winnebago to share some final quality time with their cancer-stricken dog, Jerry. Their story is just one example of how strong the bond can be between dog people, cat people, and their four-legged, furry, very close and personal friends.