Their impressive reproduction rate (25 to 100 babies per year!) requires proactive and structured intervention. For a complete treatment, access points must be adequately addressed, and follow-up must be executed at predetermined intervals. Excrement traces are often how we detect the presence of mice. Although more curious than rats, mice still remain cautious of any signs of danger and therefore avoid humans as much as possible. Like all pests, mice and rats carry their fair share of microbes and bacteria.