In general, bedding for an animal must be comfortable, clean, and absorbent. There are several materials, both organic and inert, that may be used for bedding, and most may be used for all types of livestock. When organic materials are used, ammonia volatilization is reduced, improving the air in the housing facility. Bedding, as with other aspects of livestock management, can be manageable through proper care and attention. In the case of milking, pregnant, nursing, or very young livestock, specific attention to bedding is required. These four categories of animals are the most susceptible to disease.