Having been chased by dogs in many countries, I am always surprised, that dogs in Malaysia just cannot be bothered to chase cyclists, from my ramblings around that country, even in Pack mode they just look at you, yawn and go back to what the do best sleeping, which then puts you off guard when you cross the border into Thailand, where then become a snarling, slavering, manic beast, hell bent in taken a chew out whatever part of ones body they can sink their teeth into.
A few years ago I was riding to work here in Crawley, when this big monster of a staff type dog chased me and sunk his teeth into my work boots, when i spoke to the young lady who was with the dog she told me that he was just playing, when I pointed out that I did not consider that a mouthful of tooth holes in my boots was playing and it could have been just as easily have been a child it attacked. Because of her attitude, I told her I was going to phone the police, that shocked her and she phoned her husband. He went berserk with her, and got her to get me to wait until he could get to where we were.
Turned out he had told her time and time again not to let the dog off the lead, as it liked to chase bikes, cars and also he tended to get a little boisterous around children. Seems some folk just don't understand that dogs do damage to peeps, even after all the bad publicity in the press they never learn.