How can I determine if a rat has a cold? - briefly
Watch for nasal discharge, frequent sneezing, watery eyes, reduced activity, loss of appetite, and a mild rectal fever; the presence of several of these signs indicates a likely upper‑respiratory infection.
How can I determine if a rat has a cold? - in detail
Observe the animal’s breathing. Rapid, shallow respirations or audible wheezing indicate airway irritation. Nasal discharge that is clear to white, occasionally tinged with blood, is a common sign. Look for sneezing episodes occurring several times per hour.
Check the eyes and ears. Watery eyes or increased ear wax often accompany upper respiratory issues. The animal may rub its face against objects, suggesting irritation.
Assess behavior and appetite. A decrease in food and water intake, lethargy, or reduced grooming are typical responses to illness. Weight loss over a few days signals a problem that may require intervention.
Examine the fur and skin. A ruffled coat, especially around the head and neck, can result from congestion.
Consider temperature. Normal rat body temperature ranges from 99 °F to 101 °F (37.2 °C‑38.3 °C). A rectal thermometer can confirm fever, which often accompanies infection.
If multiple signs appear—nasal discharge, sneezing, altered breathing, reduced activity, and possible fever—consult a veterinarian promptly. Early treatment with appropriate antibiotics and supportive care improves recovery chances.