They look like are mouse droppings definitely not rat ones as they too small mouse do grain of rice size compared to rats which are raisen size. Read this it gives you some good advice to see if it is and how to deal with it. http://warnell.forestry.uga.edu/service/...

Sounds like it's the droppings of a rodent.

Rats

You've got a field mouse. Those are mouse droppings.

Those are rodent droppings

That's called feces time to call an exterminator.

Have you been drinking miniature shrimp cocktails again?

I came back from college and found these little black pellets scattered all over my room...They were mostly in a corner on my carpet but there were a few in random places, like my wardrobe and old boxes. One appeared on my desk while I slept. They seem too big to be bug droppings but too small to be mouse droppings. Plus, I didn't find any dead bugs anywhere, which you'd think there would be plenty of if I had an infestation.They're the size and shape of small grains of rice, and they're very hard. What the heck are these things???