A sudden increase or decrease in appetite can be a sign of illness. If your cat is not eating as much as usual or has lost interest in food, it may indicate a health issue.
Significant weight loss or gain without an obvious reason (like a change in diet) can be indicative of a health problem.
If your cat is unusually lethargic, sleeping more than usual, or seems uninterested in activities they normally enjoy, it may be a sign of illness.
Drastic changes in behavior, such as increased aggression, hiding, or excessive vocalization, can be a sign that something is wrong.
Occasional vomiting or diarrhea can be normal, but if it becomes frequent or is accompanied by other symptoms, it may indicate a health issue.
This can include urinating more frequently, difficulty urinating, or noticeable changes in the color or smell of the urine. These signs could indicate a urinary tract issue.
Labored breathing, coughing, wheezing, or any other abnormal respiratory signs may indicate a respiratory issue.
Cats are typically meticulous groomers. If you notice a sudden decline in grooming or cleanliness, it may signal an underlying problem.