What factor can indicate dehydration in a pet during an examination?

Dry mucous membranes are a significant indicator of dehydration in pets during an examination. When a pet is adequately hydrated, the mucous membranes, such as those in the mouth, appear moist and flexible. However, when a pet is dehydrated, these membranes become dry and sticky, which is a clear sign that the body is lacking sufficient fluids. This change in the condition of the mucous membranes occurs because hydration levels directly affect the moisture balance in the tissues of the body.

Other signs of dehydration can include changes in skin elasticity, a decrease in urine output, and lethargy, but dry mucous membranes are among the most visible and easily assessed during a routine examination. Recognizing this sign is crucial for veterinary assistants, as it can guide further diagnostics and treatment plans to ensure the animal's health and well-being.