How is "Yin deficiency" characterized in TCVM symptoms?

Yin deficiency in Traditional Chinese Veterinary Medicine (TCVM) is characterized by a general lack of cooling, moisture, and nourishment within the body's systems. This condition manifests through symptoms such as dryness, heat sensations, and restlessness. The excess dryness may affect various bodily fluids and tissues, leading to sensations of internal heat, which can cause discomfort and irritability. Animals exhibiting these symptoms may show an increase in their metabolic functions, leading to a more active or restless demeanor.

The other choices present symptoms associated with different patterns or conditions. For example, excessive sweating and cold limbs typically indicate a yin excess or yang deficiency. Dizziness and fatigue may relate more closely to blood deficiency or qi deficiency, not solely to yin deficiency. The option mentioning increased yang energy and irritability points towards a yang excess scenario, which is in direct contrast to the characteristics of yin deficiency. Therefore, the correct portrayal of yin deficiency centers around the presence of dryness, sensations of heat, and an overall feeling of restlessness, which correctly aligns with the symptoms presented in the correct answer.