As a dog owner all I have to say on the subject is;

One surefire way to turn a friendly dog chase into an attack is to act aggressively toward the dog.

I ride bikes and I own a dog. I can assure you that my dog will not harm you, I can also assure you that I will harm you if you harm my dog. This is not a threat, it is simply an involuntary and uncontrollable fact. Kick my dog, you have me to deal with and I guarantee that I am much meaner than my pup. If you have ever successfully kicked a dog there is very little chance that he had any intention of biting you before the kicking, the average dog is simply quicker than a human foot.

To brag about kicking a dog is equivalent to a motorist bragging about running a bicyclist off the road.