There is no exceptionalism in existence, all creatures great and small make their existence each day. We cope how we can and manage as we're able.
Fatigue hits my mind like a pillow steamroller, weighing my eyelids and flattening my consciousness each time they droop. I cannot stay functional, my thought threads keep breaking. My kitty arrives, dropping down beside me from the headboard. I scratch his ears and soon fall asleep with him across my legs.