Signs Your Pet May Be Sick

Pets can't tell you when something hurts. You have to notice the small changes, and sometimes those changes are the first clue that something is wrong.

A pet that suddenly stops eating, sleeps much more than usual, hides, drinks a lot of water, or acts strangely may be dealing with a health problem.

One unusual behavior doesn't always mean your pet is sick. But when a change lasts, gets worse, or appears with other symptoms, it's time to pay attention.

1. Your pet suddenly stops eating

A missed meal can happen for simple reasons, especially after a stressful event or a change in food. A continued loss of appetite is different.

Dogs and cats can lose interest in food because of dental pain, stomach problems, infections, stress, medication, or other health conditions.

2. Your pet is drinking much more water

Hot weather and extra exercise can naturally increase thirst. A sudden and persistent increase in drinking can have another cause.

Increased thirst and urination can occur with conditions such as diabetes, kidney problems, hormonal disorders, or medication effects.

If you've noticed a clear change, measure how much water your pet drinks when possible and tell your veterinarian.

3. Your pet is drinking much less

A pet may drink less on a cool day or when eating food with more moisture. A major drop in water intake is more concerning, especially when your pet also seems tired or refuses food.

4. Your pet is sleeping much more than usual

Pets sleep a lot. Cats can spend around 12 to 16 hours sleeping each day, while dogs also spend plenty of time resting.

The concern is a noticeable change from your pet's normal routine. If your normally playful dog suddenly refuses to get up, or your cat becomes unusually withdrawn, something may be wrong.

5. Your pet is hiding

Cats especially may hide when they're frightened or uncomfortable. Dogs can also become quiet or seek isolated places when they don't feel well.

Hiding by itself doesn't tell you what's wrong. Hiding together with poor appetite, vomiting, weakness, breathing changes, or pain deserves more attention.

6. Your pet vomits repeatedly

One episode of vomiting can happen after eating something unusual or too quickly. Repeated vomiting is a different situation.

Contact your veterinarian if vomiting continues, happens several times in a short period, or comes with weakness, blood, abdominal pain, diarrhea, or refusal to eat or drink.

7. Your pet has diarrhea

Mild diarrhea can happen after a sudden food change or something unusual being eaten. It can also be caused by parasites, infections, inflammation, or other health problems.

Watch how your pet acts. Diarrhea combined with vomiting, weakness, dehydration, blood, or a refusal to eat needs veterinary attention.

8. Your pet is losing weight

Unplanned weight loss is worth checking. Your pet may be eating less, having trouble absorbing nutrients, or dealing with a medical condition.

Weighing your pet regularly can help you catch changes before they become obvious. For small pets, even a small amount of weight loss can matter.

9. Your pet has trouble breathing

Breathing problems need quick attention. Heavy panting after exercise can be normal for dogs, but difficulty breathing while resting is a different matter.

Cats that breathe with their mouth open, breathe very rapidly, or appear to struggle for air need urgent veterinary care.

10. Your pet has pale or unusual gums

Healthy gums are usually pink in dogs and cats, although normal color varies between individual animals.

Very pale, white, blue, gray, or yellow gums can be a warning sign. If you notice a sudden color change, contact a veterinarian promptly.

11. Your pet is suddenly limping

A limp can come from something minor, such as a sore paw, or from an injury involving a joint, bone, muscle, or ligament.

Check the paw gently for something stuck between the toes, but don't force a painful leg into a different position.

Severe limping, inability to put weight on a leg, swelling, obvious injury, or significant pain needs veterinary attention.

12. Your pet keeps scratching or licking one area

Occasional scratching is normal. Constant scratching, chewing, or licking can point to fleas, allergies, skin irritation, infection, or pain.

Look for redness, hair loss, sores, swelling, scabs, or a bad smell from the affected area.

13. Your pet's coat looks different

A healthy coat usually reflects your pet's normal grooming and overall condition. A sudden greasy, dull, matted, or unkempt coat can happen when a pet doesn't feel well.

Cats that stop grooming may develop a messy coat quickly. This can be one of the earliest visible changes in an older or unwell cat.

14. Your pet has bad breath

Strong or persistent bad breath isn't something you should simply accept as normal. Dental disease is a common cause, especially in adult and senior pets.

Drooling, swollen gums, bleeding from the mouth, difficulty chewing, or dropping food can point toward dental pain.

15. Your pet is urinating differently

Changes in how often your pet urinates, how much urine it produces, or where it urinates can signal a health problem.

Cats that repeatedly visit the litter box, strain to urinate, cry while urinating, or produce little or no urine need prompt veterinary attention.

16. Your pet's behavior suddenly changes

You know your pet's usual personality. A normally social dog that suddenly becomes withdrawn, or a friendly cat that starts hiding and avoiding touch, may be telling you something.

Behavior changes can come from stress, pain, illness, changes at home, or aging. Look at the whole picture rather than one behavior alone.

17. Your pet has unusual discharge

Discharge from the eyes, nose, ears, or other areas can happen with infections, allergies, injuries, or irritation.

Thick discharge, blood, swelling, a bad smell, or discharge combined with weakness or breathing problems should be checked by a veterinarian.

18. Your pet seems painful

Pets often hide pain. You may notice smaller clues instead, such as reluctance to move, avoiding stairs, growling when touched, hiding, changes in posture, or suddenly becoming less active.

Don't give your pet human pain medication unless a veterinarian specifically tells you to. Some common human medicines can be dangerous or even fatal to pets.

When should you call the vet?

Call your veterinarian when a symptom persists, keeps returning, or comes with other changes. You don't have to wait until your pet looks extremely sick.

Your veterinarian will usually want to know when the symptoms started, what changed, what your pet has eaten, how much it has been drinking, and whether its bathroom habits have changed.

Signs that need urgent attention

• Difficulty breathing
• Collapse or inability to stand
• Severe or sudden pain
• Repeated vomiting
• Vomiting blood
• Severe weakness
• Blue, gray, or very pale gums
• Seizures
• Suspected poisoning
• Severe bleeding
• Inability to urinate
• Major abdominal swelling

How to check your pet every day

You don't need a complicated routine. Spend a few minutes watching how your pet eats, drinks, moves, sleeps, and behaves.

• Check appetite.
• Check water intake.
• Notice energy levels.
• Watch bathroom habits.
• Look at the eyes, nose, ears, and gums.
• Check the coat and skin.
• Notice changes in behavior.

The goal is to know what's normal for your own pet. That makes unusual changes much easier to spot.

What should you do if you're unsure?

Trust the change you noticed. You don't need to diagnose your pet at home. Your job is to notice the problem and give your veterinarian useful information.

Write down when the symptom started, take a photo or short video if it helps, and keep track of eating, drinking, urination, and bowel movements.

Signs your pet may be sick

Loss of appetite, unusual thirst, vomiting, diarrhea, weight loss, breathing changes, hiding, limping, poor grooming, unusual bathroom habits, and sudden behavior changes can all be signs that your pet needs attention.

Some changes are harmless and temporary. Others need treatment. If something feels clearly different from your pet's normal routine, especially when several symptoms appear together, contact your veterinarian.