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Hydration
Hydration -- the body's water balance -- is regulated by the kidneys. Healthy kidneys conserve water during dehydration and remove excess water when overhydrated. In chronic-kidney-disease, this regulation fails, forcing the pet to drink excessively (polydipsia) to compensate.
Key Facts
- Cats naturally have a low thirst drive (desert ancestry) making them prone to chronic mild dehydration
- Failing kidneys cannot concentrate urine, requiring increased water intake
- Canned food (70-80% water) helps maintain hydration better than dry kibble (10-12%)
- Multiple water bowls, fountains, and dripping faucets can encourage drinking
- Dehydration can be addressed with fluid-therapy in CKD patients
- Species: dogs and cats (cats especially vulnerable due to low thirst drive)