What does "hydration" refer to in animal health?

Hydration in animal health specifically refers to the balance of water in the body. Water is crucial for various physiological processes in animals, including digestion, circulation, temperature regulation, and waste elimination. Maintaining proper hydration levels is essential for the overall health and well-being of an animal. Dehydration can lead to serious health issues, including organ failure, and can even be life-threatening.

The other options focus on distinct aspects of health and nutrition that do not encompass the concept of hydration. For example, while vitamins are important for health, they do not directly relate to water balance. Feeding animals pertains to nutrition and diet, but it does not necessarily address how water intake affects hydration. Lastly, while the condition of the skin and coat can be influenced by hydration, it is more of an outcome or symptom rather than a definition of hydration itself. Thus, having a clear understanding of hydration as the balance of water in the body is key to ensuring animal health.