Decreased Thirst (Hypodipsia) in Cats
Key takeaways
Decreased thirst, or hypodipsia, in cats is characterized as a decrease in water intake.
- If the cat has decreased thirst, associated symptoms of dehydration (lethargy, sticky gums, weakness, reduced appetite) may also be present
- Hypodipsia and adipsia (the complete lack of drinking) is usually caused by an underlying illness or injury
- Any illness causing a cat to be nauseated, lethargic, or painful can result in decreased thirst
- In rare cases, the brain’s thirst mechanism may malfunction, causing a cat to not feel thirsty
- Diagnostics include physical examination, diagnostic imaging, blood work, and urinalysis
- Treatment depends on the underlying cause but can include symptom management, fluid replacement, medication, and surgery
- This is a common symptom in ill cats and requires prompt intervention to prevent furthering symptoms of dehydration
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A closer look: Decreased Thirst (Hypodipsia) in Cats
Decreased thirst is a common symptom in sick cats. The average cat drinks ½ cup (125mL) of water per 5 pounds (2.3kg) of body weight per day.
Regardless of the condition causing the decrease in thirst, dehydration is a serious condition that can increase severity of other conditions. A cat that has not had water in over 24 hours needs emergency medical attention. In cases where other symptoms are present or in very young and very old cats, emergency care is needed sooner.
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Possible causes
In rare cases, the brain’s thirst mechanism malfunctions, causing a cat to not feel thirst.
Risk factors
Decreased thirst can vary as partial (hypodipsia) or complete (adipsia) lack of thirst. It can also be present in conjunction with other symptoms or, very rarely, as an isolated symptom.
Testing and diagnosis
Given the large variety of associated conditions, a large number of tests are needed to determine the cause. This includes a physical examination, blood work, urinalysis, and diagnostic imaging.
Treatment varies depending on the underlying cause. Immediate treatment may be supportive care including fluid replacements. Depending on the underlying cause, other treatments might include hospitalization, medication and surgery.
Similar symptoms
Behavioral changes in drinking are easily confused with medical symptoms. Examples include:
- A cat who is picky about drinking sources
- Cats that appear to drink less than desired
- Learned behavior
