TL;DR: Excessive thirst and vomiting in cats are high-priority symptoms that often indicate serious conditions like kidney disease or diabetes. Seek immediate veterinary care if your cat is lethargic or cannot keep water down to prevent life-threatening dehydration.
What does it mean if my cat is drinking significantly more water than usual and vomiting?
When a cat begins drinking significantly more water than usual—a condition known as polydipsia—and follows it with vomiting, it is a clinical sign that their internal systems are under stress. Common underlying causes in felines include:
- Chronic kidney disease
- Diabetes mellitus
- Hyperthyroidism
- Acute toxicity
Is it a veterinary emergency if my cat is thirsty and vomiting?
- Urgency Level: High.
- The inability to keep water down leads to rapid dehydration and dangerous electrolyte imbalances.
- Seek veterinary care within 24 hours if your cat is lethargic, has pale gums, or has lost their appetite.
- Treat as an immediate emergency if your cat is persistently vomiting and cannot keep any fluids down.
How can taking a photo of my cat’s vomit help with the veterinary triage process?
- The color, consistency, and volume of the fluid provide immediate diagnostic clues, such as distinguishing between clear froth and yellow bile.
- A photo of your cat’s resting posture helps the vet assess their level of pain or discomfort before you arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
When a cat presents with excessive water consumption and vomiting, a thorough history and clinical examination are crucial to determine the underlying cause. Vomiting may stem from dietary indiscretion, parasitic infection, bacterial or viral gastroenteritis, anxiety, or motion sickness. Persistent vomiting, depression, abdominal discomfort, and fever warrant reevaluation, including careful palpation for foreign bodies or abdominal pain and oral examination for linear foreign bodies. Abdominal radiographs may be indicated to identify radiopaque foreign objects or signs of intestinal obstruction. Profound depression, dehydration, and abdominal pain may be present, with palpation potentially inducing vomiting and revealing thickened intestinal loops or enlarged mesenteric lymph nodes. A specific diagnosis should be pursued if there is a history of access to foreign objects or toxins, if clinical signs persist beyond 2 days of symptomatic treatment, or if hematemesis, melena, systemic illness, or abnormalities on abdominal palpation are noted. Further diagnostics, including a CBC, serum biochemical profile, urinalysis, and potentially advanced imaging, may be necessary.
Chapter: Gastroenterology
Source: The Merck Veterinary Manual, 11th Edition (Page 390)