What happens if a dog goes 2 days without water?
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Expert Answer
A dog without water for 2 days may suffer dehydration, shock or even acute renal failure and death. If the dog is strong and weather not hot, 2 days may only cause mild dehydration with sunken eyes, weight loss and low skin elasticity, which improves with prompt watering.
But a weaker dog going long without water easily dehydrates and shocks, and reduced kidney perfusion can cause acute renal failure, threatening its life.