Above you can see two mice of my half-brother. We took the photo last summer when we did let them play on the lawn. We had to be very careful that they don’t run away.
But even if they are fast runners, they were not that fast outside due to the fuzzy grass and probably also because they are not that experienced like a mouse that lives in this habitat. Anyway, that doesn’t mean that they didn’t try to check out the whole lawn. We had to be careful anyway.