Many dogs do not win the fight against distemper; however, if a dog does recover, you will continue to notice symptoms, including general lethargy, for several weeks following recovery. (dogs.lovetoknow.com)
Birds with this disease commonly lose their appetite and develop general lethargy. (healthguidance.org)
Be on the lookout for vomiting, loose stool, diarrhea, hair and skin conditions such as hair loss, hot spots, itching and general lethargy after eating. (dogfood.co)