I hit a squirrel once. I slowed to give him lots of time, but he kept running back and forth and pausing. Finally as I came upon him he stayed put, on all fours, well clearing the car bumper.
Then he stood up at the last second and stared at me. Thunk!
Worst part was, I didn’t see his body in the rearview. Could’t find it either in the front grille. No idea what became of him.