Rats’ teeth continue to grow throughout their lives, necessitating them to gnaw on complex substances such as lead and plastic pipes, insulation material, and electrical wiring. Wiring that runs too close to each other, like on the same power supply or cable, can cause short circuits and fires. They also spread a slew of hazardous diseases, including Salmonella, Leptospirosis (Weil’s disease), Tuberculosis, and even tapeworms.