I've got 8 cats and 5 dogs. They're pretty much ok, as long as they don't meet each other inside the house. Or else it would turn like a bloody war zone. I don't have much of mice problems at home.
But I don't plan to add any more pets any time soon. i think 8 cats and 5 dogs is enough. Plus my pet monkey and lizard.
It's cool to know you've got plenty of pets. Take good care of them.