Rats in SK get that big. Every once in a while you'll discover a nest under an old abandoned wood grain bin. You get the dogs and a few guys with shovels, then you lift one end of the grain bin with a front end loader. Rats run out and you're swinging the shovel.
I've attended two of these rat bashings. Ah the good old days.
When the BIG male rats come out (as pictured above) they can put on a fight. The dogs always win, but I've seen some big, mean dogs get quite cut up from one big mean rat. I've also witnessed big dogs that weren't mean enough and had the rat hurt them enough to put the dog on the run for a few seconds.