Rats and mice carry obvious health risks from their droppings and constant incontinence.
Rats often cause electrical fires by gnawing on plastic electrical junction boxes. By nature, routinely gnaw on hard objects to cut back their constantly growing incisor teeth.

Where do the rats and mice ... live and breed ?
They live in drains, under concrete, in sub floors and in garbage refuse areas, kitchens, roof voids and other areas where a potential food and moisture source is available.

Rats and mice often become a serious problem in cold winter months (they come in from the cold), or excavation work disturbs there in ground nesting locations or their food source is changed.

A female house mouse gives birth to a litter of approximately six mice about 19 days after mating and is capable of mating again in two days.
She can produce six to 10 litters a year. Her offspring are able to mate two months after birth.
They can produce 2,500 heirs in six months, with ideal conditions and no mortality.
Mice will establish a nesting site near sources of food and feed 15 to 20 times a day.

Professional knowledge of the rodents habits is essential to eradicate a problem, for example, rats avoid bait touched by human hand - they have an acute sense of smell.

Pest control options may include the use of mechanical traps and the selective use of latest generation rat baits. Any rat baiting program should use safety dispensers placed in areas preferably that is secure from children and pets - such as in a roof void and sealed sub-floor and/or storage rooms.

Sanitation / Housekeeping: Rodent pests thrive where food and water is readily available. All food stuffs should be kept in sealed containers or rooms. Garbage and refuse should be similarly stored. Water and food bowls for the pets or otherwise should not be left out at night as this will encourage a rodent infestation in the building.