Rats there are many types, but for this reason I will generalize. rat 2

Rats need to gnaw constantly as their teeth grow through-out their lives,this can damage  pipes, electrical wires, burglar alarm systems, etc. Rats can also get into motor vehicles and cause thousands of Rands worth of damage.

Rodents also carry diseases such as salmonella gastro-enteritis and numerous other diseases.

They breed at an alarming rate,it is estimated that a pair of rats could grow to 2000 with in 1 year.-killer-rat