Introduced pest species such as housemice, black rats and brown rats
should be humanely treated and if sick taken to a veterinary clinic.

Pest species are not native animals and wildlife shelters will refuse
to take them.
However, if you are uncertain of exactly which species you do have,
please contact your veterinarian or wildlife shelter.

While pest species may not be native, they are still wild animals and
suffer more if kept in captivity.
Re-release may seem unorthodox and unfaverable by councils and
general community, particulary in bushland areas where introduced
species are a threat to native animals. In such cases humane
euthanasia is recommended.

However, in built up areas, re-release is often a more humane option,
despite being frowned on. Prevention is far better than cure with
feral animals. Do not provide a habitat suitable fro breeding and
they will not breed to plague numbers.

besides, it cannot be worse than humane overpopulation. Whose heard
of a feral rat building a nuclear bomb? Or, a rat committing genocide?
........bla bla bla