This Volume 1 of a two-volume work provides an up-to-date overview of the latest advances in live biotherapeutics research. It focuses on key areas within probiotics and microbiome studies from the veterinary sciences including their translation into commercial applications. The book is divided into three sections, comprising (I) fundamentals about probiotic resources, (II) probiotics for veterinary health, with chapters on farm animals, pets, wildlife and aquaculture, and (III) industrial applications of probiotics. The broad spectrum of industry-relevant contributions makes this work a valuable resource for industry professionals as well as researchers in functional feed and food biotechnology, applied veterinary microbiology and gastroenterology. Presenting novel and evidence-based research, this volume will drive the commercial enterprise and meets the great demand for good probiotic products in the veterinary medical sector.