In WA, there is volunteer section from DEC ( environment and conservation) called Wildcare. They receive calls relating to this issue and the pass info to the co-ordinator who calls out volunteer Animal Control Agents who will check the animal and take to a vet / animal rehab centre or if needs be shoot it. Police are only to be used as a last resort over here if shire rangers etc are not available.

I have lost count how many times i have been called out by DEC for these scenarios. In every instance i have had to shoot the animal.