Bingley always hears it before I hear it.
He came to me crying.
I let him out.
He turned around and came back inside.
I offered food.
He ignored it.
I tried Pepto-Bismol.
He still whimpered.
I didn't figure it out this morning until I noticed that it was raining. About that time, I finally heard it: thunder.
Big, brave Bingley is terrified by thunder.
Timid, easily startled Magic is sleeping soundly.
Most of the thunder is too faint for me to hear, but Bingely's hearing is acute.
Happily, we live in Southern California where it "never" thunders.