If your cat exhibits any of these 10 behaviors, visit your veterinarian

Cats tend to hide when they're not feeling well, making it challenging to immediately know if your cat is sick. However, your pet may start behaving a bit strangely. If your cat displays any of these 10 behaviors listed on the PetMD website, consult your veterinarian.

1. Your cat has suddenly started eating a lot.

Many people worry when their pets stop eating, but an increase in appetite is also a sign that your cat may be unwell. According to expert Rachel Barrack, possible endocrine disorders such as diabetes or hyperthyroidism, or nutritional absorption disorders like colon cancer or inflammatory bowel disease, could be the cause.

2. Your cat is drinking more water than usual.

Veterinarian Kelly Ryan notes that increased water consumption is a sign that your cat is unwell. "While cats need plenty of fresh water, drinking too much liquid may indicate kidney disease, diabetes, or thyroid problems," she observes.

3. Your pet doesn't groom itself as much as before.

Cats may stop grooming for various reasons, one of which is obesity. "Obesity can lead to many health problems, including cancer, diabetes, and a reduction in life expectancy and quality of life," says Rachel Barrack. Old age is also accompanied by changes in cat habits, as well as dental issues, injuries, or arthritis.

4. It makes an unusually high amount of noise.

Meowing is an important form of communication between cats and humans. If your cat is unwell, it may start "talking" more, or its meow may change. Conversely, if your talkative cat suddenly becomes quiet, rush to the veterinarian.

5. Your cat has bad breath.

According to veterinarian Kelly Ryan, 85% of cats have dental issues by the age of 3, and bad breath is one of the symptoms. "A cat with diabetes may have sweet-smelling breath and increased thirst and urination. A cat with kidney disease, on the other hand, may have ammonia-smelling breath because the kidneys can't filter waste properly," she explains.

6. It doesn't use the litter box correctly.

Unless there's been a change in the environment, such as the arrival of a new pet, a health problem may explain why your cat isn't using the litter box correctly. Some possibilities include arthritis, cancer, feline interstitial cystitis, kidney stones, or urinary tract infections. Consult a veterinarian.

7. Your cat's pupils don't seem normal.

Fluctuations in pupil size are normal when light levels change. But if changes happen randomly or are permanent, something might be wrong. If one pupil is dilated and the other constricted, this could also be a sign of disease. Additionally, be aware of other eye conditions, such as discharge or a third eyelid covering part of the eye.

8. Your cat is a bit grumpy.

If your domesticated cat appears irritated, it could be a warning sign that you need to schedule an appointment with the veterinarian. "Increased anger can be a sign of pain and/or senility," says Rachel Barrack. Cats with joint or back pain may react aggressively when you touch the area that bothers them. An overactive thyroid can make your cat hyperactive and react in ways that sometimes seem hostile.

9. Or it doesn't want to play.

If you have a playful cat, and it no longer seems interested in activity, keep an eye on it. Consider the circumstances, but if you can't find an obvious reason, contact a specialist.

10. Your pet is always hiding.

Some veterinarians believe that cats hide when they're sick to protect themselves during this vulnerable period, while others think cats want to sleep in peace and recover. According to Kelly Ryan, it could also be a sign of sorrow, stress, anxiety, or fear. All cats need rest at times, but if your cat starts disappearing regularly for long periods (especially if there are other behavioral changes), it's time to talk to your veterinarian.