10 Signs Your Cat Might Be Sick
Cats are experts at hiding illness. Learn the subtle warning signs that indicate your cat may need veterinary attention.
10 Signs Your Cat Might Be Sick
Cats are masters at hiding pain and illness — an instinct inherited from their wild ancestors. By the time symptoms are obvious, the condition may be advanced. Here are the subtle signs to watch for.
1. Changes in Eating Habits
A sudden decrease or increase in appetite can signal dental problems, kidney disease, diabetes, or digestive issues. If your cat skips more than two meals, contact your vet.
2. Hiding More Than Usual
While cats enjoy alone time, a sudden increase in hiding behavior often indicates pain or illness. A cat that normally greets you but suddenly retreats under the bed deserves attention.
3. Changes in Litter Box Habits
Watch for:
- Urinating outside the box — could indicate UTI or kidney issues
- Straining to urinate — potentially life-threatening urinary blockage
- Diarrhea or constipation lasting more than 24 hours
- Blood in urine or stool
4. Weight Changes
Unexplained weight loss is one of the most common signs of illness in cats, often linked to hyperthyroidism, diabetes, or cancer. Sudden weight gain can indicate fluid retention or hormonal problems.
5. Changes in Grooming
- Over-grooming (bald patches) may indicate allergies, pain, or anxiety
- Under-grooming (matted, greasy coat) suggests the cat doesn’t feel well enough to groom
6. Increased Thirst
If you notice your cat drinking significantly more water than usual, this could be a sign of diabetes, kidney disease, or hyperthyroidism. Monitor water bowl levels for a few days.
7. Vomiting
Occasional hairballs are normal, but frequent vomiting (more than once a week) is not. Repeated vomiting, especially with bile or blood, requires prompt veterinary attention.
8. Changes in Vocalization
A normally quiet cat that starts crying or yowling may be in pain. Conversely, a normally vocal cat that goes silent could also be unwell.
9. Bad Breath
While cats don’t have minty-fresh breath, a sudden foul odor can indicate dental disease, kidney problems, or diabetes (which can cause a sweet or fruity smell).
10. Lethargy
Cats sleep a lot (12–16 hours daily), but if your cat seems less interested in play, doesn’t respond to stimuli they normally enjoy, or seems unusually sluggish, it’s time for a checkup.
When to See the Vet Immediately
Seek emergency care if your cat shows:
- Difficulty breathing or open-mouth breathing
- Inability to urinate (especially in male cats)
- Seizures
- Trauma or bleeding
- Ingestion of toxic substances
- Complete refusal to eat for 24+ hours
Regular veterinary checkups (at least annually, twice yearly for senior cats) can catch many issues early. Trust your instincts — you know your cat best.