The RSPCA in Victoria, Australia has scary powers. The police can't enter homes without permission from the resident or authorization from their superior, they can't take animals off your property either.
The RSPCA Inspector got a claim from a 'Joe Public' that my assistance dog was being starved, He came, forced his way through my front door, broke the lock on my laundry door, cut my dog's tether (he's known to jump my fence when he's left out to go toilet. I was home during all this) took a dog leash and looped it around his neck and walked my dog to his van. He dropped a bit of paper on my kitchen floor and left. Apparently, due to DPI pet standards(purebred staffordshire standards) my greyhound/shepherd assist dog gave him 'immeadiate welfare concerns'. He's 2" too short for a pure greyhound, 2" too tall for a labrador (they changed his microchip details) and 30kgs isn't underweight for a lab, so he's not starved, and his bowl was filled that morning, before he came and kicked it over.
The law says he must be trained to help me. I have given them a copy of his Public Access Test to prove he's not a pet. I have the right to visit him, but must be supervised by the bonehead who took him AND the head inspector, but the thief hasn't been contactable since he took the dog, 2 days before christmas.