Because their immune systems are still developing, they are especially at risk of malnutrition and even death from food which is improperly prepared in unhygienic conditions. (unicef.org)
As one of the common postpartum complications, mastitis is a condition of breasts infection that may occur when bacteria gains entry into the breasts via abraded skin, the baby's mouth, or unhygienic conditions such as dirty clothing, etc.. (newkidscenter.com)
For example, a mother dog will ingest the puppy's feces to prevent unhygienic conditions which could potentially lead to disease. (puppy-training-solutions.com)