There are a number of tick species that affect companion animals in Australia, including the Brown Dog Tick, Bush Tick and the most dangerous the Paralysis Tick. The deadly Paralysis Tick is carried by common wildlife such as possums and bandicoots. Domestic animals have no immunity to tick toxin and while they may not leave the backyard they are still at risk. You can protect your dog against Paralysis Tick's with either Chewable Monthly Tablets, a 'Spot On' Treatment or applying a Tick Collar.