Lots of hot spots now where stock is going to be taken regular like Blackall Shire in Queensland, plus others will range in size from small terrier to large Bull Mastiff's and Alsatians they are by looks the kind of dogs you see everyday but with a taste for blood and not adverse to killing large animals other dogs pigs red's and obviously the road kill, we used to just hang them on the fences, this will escalate into more of a problem and i am surprised there have not been any tragic loss of human life that i know of, they make the uk pitbull style chav dog look like a total pussycat!
To answer the above post they are not Dingos just feral unwanted and inbred dogs been wild for years, sadly the Dingo is in very limited numbers as these feral dogs breed with them polluting the natural and unique gene pool of the true Dingo which is another issue, the pure genetic line of dingos is i beleive only found now on Frazer Island.