Most dogs become lethargic after being dipped. (1800petmeds.com)
This chinchilla is healthy, but if your chinchilla or other small animal pet becomes lethargic, can't handle exercise or suffers any other symptoms of heart trouble, see your veterinarian. (smallanimalchanel.com)
Another is that while in - utero, a baby might also become lethargic and have trouble getting into position for delivery. (americanpregnancy.org)