Final answer:
Animals in mills commonly face Respiratory Problems, Digestive Issues, and Skin Conditions due to poor and unsanitary conditions.
Step-by-step explanation:
The common health issues that animals raised in mills may encounter include Respiratory Problems, Digestive Issues, and Skin Conditions. These issues are often due to poor living conditions, such as overcrowding, unsanitary environments, and inadequate veterinary care. Respiratory problems can be triggered by poor air quality and exposure to contaminants, while digestive issues may arise from ingestion of contaminated food or water. Skin conditions could also occur as a result of unhygienic surroundings and constant contact with irritants.