There overbreeding now because no one is hunting them for their fur. There are laws controlling hunting seasons, where only certain species are allowed to be taken within a designated time. Many are also highly protected. Generally those seasons are obeyed, but some people always shoot out of season. Pademellons are wallabys.
Kangaroos are different.
There is a rat kangaroo, but its really a Wallaby. Wallabys are usually 3 foot and under when full grown. Kangaroos and Wallabys are all from similar families. Marsupials breed here during the winter, which necessitates the pouch. Technically they aren't born until they come out of their pouch.