I had a friend who had a red heeler, and in all the years I knew him, his dog hated me. Whenever I visited, the dog had to be put on a leash out the back, or I was definitely going to get bitten. His mother bred Siamese cats and they also had an Old English sheep dog, and they all hated me too. Worst thing was that the cats and the sheep dog got me quite a few times. Fortunately the blue heeler never got the chance. The funny thing is that the sheep dog and the cats were fine with all his other friends, but not me. I think the animals knew what I was like back then.