Which sign would most strongly indicate dehydration in a bird?

• A. Diarrhea
• B. Extreme thirst
• C. Vomiting
• D. Rapid weight loss

Answer: (B)

Extremely thirsty birds are showing the body's direct response to fluid loss. Thirst indicates that the bird’s system is actively trying to restore hydration, so it’s the strongest clue that dehydration is present. Other signs can occur for reasons other than current dehydration or may not appear in all cases: diarrhea depends on fluid loss rather than the immediate hydration status, vomiting is not common in birds, and rapid weight loss can reflect broader problems like illness or poor intake rather than just water deficit. So, the strongest, most direct indicator among the options is the bird's marked thirst.