Mrs. Frisby and the Rats of NIMH
She watched them for quite a long time. It was obvious that they knew exactly what they were doing, and they looked as well drilled as a group of soldiers. (5.25)
The rats on Mr. Fitzgibbon's farm just kept to themselves.
One did not prowl in their domain. (9.41-42)
"You might call him our chief engineer […] as, indeed, you might call Justin the captain of the guard—if we had any such titles, but we don't." (13.2)