Here are some general signs of illness in guinea pigs that should prompt a vet visit:
* Changes in eating or drinking habits: Loss of appetite, excessive drinking, or difficulty eating
* Changes in behavior: Lethargy, hiding, inactivity, aggression, or excessive vocalization
* Changes in appearance: Weight loss, matted fur, dull coat, runny nose, discharge from eyes or nose, sneezing, labored breathing, skin lesions, or diarrhea
* Changes in posture: Hunched back, difficulty walking, or limping
It's crucial to seek veterinary care as soon as possible if you notice any of these signs. A veterinarian can diagnose the specific condition and recommend the appropriate treatment.
Please note: I'm not a medical professional and can't provide specific medical advice. The information above is for general awareness only and should not be used as a substitute for professional veterinary care.