You would have seen clean tubs in neat racks with walkways between. There was a good amount of space between the levels of tubs (which looked like liter pans), there was chow on the screens, automatic watering system, the barn floors were clean and the bedding in the tubs looked pretty fresh, as in not a lot of visible droppings.
There were no mice on the floor, only racks of mice. Get the whole story and investigate before you believe everything the news and the animal control folk tell you. Remember, animal control serves a valuable funtion but they are also the ones who want to ban reptiles. Do you buy their ideas on that too?