Yeah Rats too.
Me and a friend, a few years ago, were helping a farmer out as we were staying on his land for a couple of weeks doing some building work for him. We were staying in an old caravan next to a grain barn.
Anyway, middle of the night, 2ish. We both heard noises coming from the barn. We both grabbed got up, me mate grabbed a shovel and torch, I picked up the 12 bore.
We entered the barn, pitch black. Sphincter factor of 8/10. My mate switched on the torch and all you could see across the barn floor were dozen of very small bright eyes (Rats) The barn floor was covered in corn and dust.
As I shot at one that was about 10ft in front of me, due to the force of the shot, combined with the slippy corn covered floor, my feet flew forwards and up in the air, I land flat on my back totally knocking the wind out of me. Quickly followed by a heavy splat of the dead Rat landing on my chest!!
Since this day I can say with no embarrassement that I'm scared of em, and I hate the evil looking blighters!!