If you notice any changes in your cat's behavior, it may be a sign that they need to see a vet. Some warning signs to watch out for include changes in appetite, weight loss, excessive grooming, coughing or wheezing, and changes in litter box habits. Other signs that may indicate a health issue in your cat include lethargy, hiding, bad breath, vomiting, diarrhea, or a sudden decrease in activity level. It's important to monitor your cat's behavior and take note of any changes, as early detection of health issues can lead to better outcomes. If you notice any of these warning signs in your cat, it's best to schedule a visit to the vet for a thorough examination and necessary treatment. By being observant and proactive in seeking medical attention for your cat, you can ensure their overall health and well-being.