According to "The Pueblo Chieftain" he suffered from cardiomyopathy, a heart disease that is common among Red Pandas.
According to the Paradise Wildlife Park he had an incurable illness.
Two of the three cubs born in August to Red Panda mother Ember passed away.
The cause of the death is yet unclear - a necropsy at the University of Tennessee Veterinarian Hospital is scheduled.
She died after health issues.