That's a valuable observation. Searching the internet one place said it was a myth and in a different site it said that mice are fearful of rats -- (because rats would eat the mice) and so -- your exact experience the mice and rats don't share the same territory.
Out here, another concern of...
Hate rodents were they shouldn't be -- indoors and in coops/runs. Also hate poisons - for reasons that posters have written in this thread.
Thanks to the contributors.
My preferred method is the walk-the-plank and subsequent drowning in a bucket. I see that one poster said that rats can...