Nanotechnology is the innovative and evolving technology with enormous potential for global revolutionization of animal sector. It offers the same opportunities for veterinarians as physicians, including therapy, diagnostics, tissue engineering, manufacturing of vaccines, and modern disinfectants. The nano-applications are already in use in animal health and production, animal husbandry and reproduction and animal nutrition. It has the ability for solving several problems associated with animal health. This review will throw the light on nanoparticles synthesis, classification, characterization, and their applications in veterinary field starting from medical applications to using the nanoparticles in animal nutrition and reproduction.