Rodents like rats and mice are a serious hassle because they transmit a series of diseases like rat fever, plague, leptospirosis etc. These diseases get disseminated through several means like urine, rat bites, droppings etc. Just them being around could cause high level of infestations. They would even chew fabrics, electrical wires, crops, flowers and trigger a high level of destruction. People suffering from allergy and asthma could be severely affected because rat urine contains allergens. Urine can also stain large areas and cause the area to stink.