Cat and dog dehydration refers to the excessive loss of body water. Pets are prone to dehydration when the weather gets very hot, and they don’t have access to enough water. As a result, they can develop heatstroke. More often, though, dog and cat dehydration happens from vomiting and diarrhea.

Here in Texas, we’ve had weeks of triple-digit temperatures. I worry about the outside pets, but even indoor cats and dogs can suffer from dehydration. Normal water loss occurs in the pet’s bathroom deposits, through moisture exhaled with the breath, and through sweat. These fluids get replaced when the cat and dog eat and drink.

Any illness may prompt pets to stop eating and drinking, and prolonged fever increases the loss of body fluid. Specific disease conditions or injuries like diabetes or kidney disease may cause excessive urination that also causes of dehydration.

Cats evolved as desert creatures and have an amazing ability to conserve water, but cat dehydration can still kill. Even though cats seem to prefer to drink water in the weirdest places (the sink? your glass? the TOILET?!) they most often just don’t drink enough water. Here’s what you need to know.