Housing systems are among the most important determinants of dairy animals' welfare because they directly affect physical health, behavior, comfort, productivity, and longevity. Dairy cattle and other dairy animals have evolved with natural behavioral needs such as grazing, walking, social interaction, lying comfortably, grooming, and expressing maternal behaviors. The design and management of housing systems either facilitate or restrict these behaviors. Consequently, welfare outcomes vary significantly depending on the type of housing, stocking density, flooring, ventilation, hygiene, feeding arrangements, and overall management practices. In addition to housing conditions, several husbandry procedures such as dehorning, disbudding, tail docking, castration, and identification methods continue to be practiced despite causing pain. Their persistence is influenced by complex socio-economic, cultural, and practical considerations rather than a simple disregard for animal welfare. Housing systems for dairy animals generally include pasture-based systems, loose housing systems, free-stall or cubicle housing, tie-stall systems, and intensive confinement systems. Each system has distinct advantages and challenges regarding animal welfare. Pasture-based systems are widely regarded as beneficial for dairy animal welfare because they allow animals to perform natural behaviors. Grazing provides opportunities for walking, exploration, social interaction, and natural feeding. Soft ground reduces pressure on joints and hooves, lowering the incidence of lameness. Fresh air and sunlight contribute to improved respiratory health and vitamin D synthesis. Animals in well-managed pasture systems often exhibit fewer stereotypic behaviors and experience lower levels of stress. However, pasture systems are not without challenges. Exposure to extreme weather conditions, parasites, predators, and seasonal feed shortages can negatively affect welfare if appropriate shelter and nutritional supplementation are not provided. Long walking distances to milking parlors may also increase fatigue in high-producing dairy cows. Loose housing systems provide animals with greater freedom of movement within barns. Cows can walk, rest, socialize, and access feeding and watering areas with relatively fewer restrictions. Comfortable bedding materials such as sand, straw, or mattresses improve lying comfort and reduce pressure sores. Adequate ventilation helps control heat stress and respiratory diseases. When properly managed, loose housing systems encourage normal social behavior while reducing injuries associated with prolonged restraint. However, overcrowding, slippery floors, inadequate bedding maintenance, and poor hygiene can increase aggression, lameness, mastitis, and stress. Free-stall housing has become one of the most common dairy production systems in many developed countries. Individual cubicles provide designated resting spaces while allowing cows freedom to